Ages A study of all the students at a small college showed a mean age of 20.7 and a standard deviation of 2.5 years. a. Are these numbers statistics or parameters? Explain. b. Label both numbers with their appropriate symbol (such as x ¯ , μ , s , or σ ).

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Answer 1

Textbook Question

Chapter 9, Problem 1SE

Ages A study of all the students at a small college showed a mean age of 20.7 and a standard deviation of 2.5 years.

a. Are these numbers statistics or parameters? Explain.

b. Label both numbers with their appropriate symbol (such as x ¯ , μ , s , or σ ).

Definition Definition Measure of central tendency that is the average of a given data set. The mean value is evaluated as the quotient of the sum of all observations by the sample size. The mean, in contrast to a median, is affected by extreme values. Very large or very small values can distract the mean from the center of the data. Arithmetic mean: The most common type of mean is the arithmetic mean. It is evaluated using the formula: μ = 1 N ∑ i = 1 N x i Other types of means are the geometric mean, logarithmic mean, and harmonic mean. Geometric mean: The nth root of the product of n observations from a data set is defined as the geometric mean of the set: G = x 1 x 2 ... x n n Logarithmic mean: The difference of the natural logarithms of the two numbers, divided by the difference between the numbers is the logarithmic mean of the two numbers. The logarithmic mean is used particularly in heat transfer and mass transfer. ln x 2 − ln x 1 x 2 − x 1 Harmonic mean: The inverse of the arithmetic mean of the inverses of all the numbers in a data set is the harmonic mean of the data. 1 1 x 1 + 1 x 2 + ...

a .

Expert Solution

To determine

Identify if the given numbers are statistics or parameters.

Answer to Problem 1SE

The given numbers are parameters.

Explanation of Solution

It is given that the study of all students in the small college showed mean age of 20.7 years and standard deviation of 2.5 years.

The numerical characteristic of the population and sample are called parameter and statistic, respectively.

The study considered all the students, which can be referred to as the population. Thus, 20.7 years is the population mean and 2.5 years is the population standard deviation. So, the given numbers are characteristics of the population.

Therefore, the given numbers are parameters.

b .

Expert Solution

To determine

Identify the appropriate symbols for the given numbers.

Answer to Problem 1SE

The numbers can be labelled as " $ " μ=20.7 yearsMathType@MTEF@5@5@+=feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLnhiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr4rNCHbGeaGqiVCI8FfYJH8YrFfeuY=Hhbbf9v8qqaqFr0xc9pk0xbba9q8WqFfea0=yr0RYxir=Jbba9q8aq0=yq=He9q8qqQ8frFve9Fve9Ff0dmeaabaqaciaaciGaaeqabaWaaeaaeaaakeaacqaH8oqBcqGH9aqpcaaIYaGaaGimaiaac6cacaaI3aGaaeiiaiaabMhacaqGLbGaaeyyaiaabkhacaqGZbaaaa@407B@ and " $ " σ=2.5 yearsMathType@MTEF@5@5@+=feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLnhiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr4rNCHbGeaGqiVCI8FfYJH8YrFfeuY=Hhbbf9v8qqaqFr0xc9pk0xbba9q8WqFfea0=yr0RYxir=Jbba9q8aq0=yq=He9q8qqQ8frFve9Fve9Ff0dmeaabaqaciaaciGaaeqabaWaaeaaeaaakeaacqaHdpWCcqGH9aqpcaaIYaGaaiOlaiaaiwdacaqGGaGaaeyEaiaabwgacaqGHbGaaeOCaiaabohaaaa@3FCC@ .

Explanation of Solution

The given numbers 20.7 years and 2.5 years are population mean and population standard deviation of the ages of students in a small college, respectively.

The population mean is denoted by " $ " μMathType@MTEF@5@5@+=feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLnhiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr4rNCHbGeaGqiVCI8FfYJH8YrFfeuY=Hhbbf9v8qqaqFr0xc9pk0xbba9q8WqFfea0=yr0RYxir=Jbba9q8aq0=yq=He9q8qqQ8frFve9Fve9Ff0dmeaabaqaciaaciGaaeqabaWaaeaaeaaakeaacqaH8oqBaaa@3736@ and the population standard deviation is denoted by " $ " σMathType@MTEF@5@5@+=feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLnhiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr4rNCHbGeaGqiVCI8FfYJH8YrFfeuY=Hhbbf9v8qqaqFr0xc9pk0xbba9q8WqFfea0=yr0RYxir=Jbba9q8aq0=yq=He9q8qqQ8frFve9Fve9Ff0dmeaabaqaciaaciGaaeqabaWaaeaaeaaakeaacqaHdpWCaaa@3743@ . Thus, the given numbers can be labelled as " $ " μ=20.7 yearsMathType@MTEF@5@5@+=feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLnhiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr4rNCHbGeaGqiVCI8FfYJH8YrFfeuY=Hhbbf9v8qqaqFr0xc9pk0xbba9q8WqFfea0=yr0RYxir=Jbba9q8aq0=yq=He9q8qqQ8frFve9Fve9Ff0dmeaabaqaciaaciGaaeqabaWaaeaaeaaakeaacqaH8oqBcqGH9aqpcaaIYaGaaGimaiaac6cacaaI3aGaaeiiaiaabMhacaqGLbGaaeyyaiaabkhacaqGZbaaaa@407B@ and " $ " σ=2.5 yearsMathType@MTEF@5@5@+=feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLnhiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr4rNCHbGeaGqiVCI8FfYJH8YrFfeuY=Hhbbf9v8qqaqFr0xc9pk0xbba9q8WqFfea0=yr0RYxir=Jbba9q8aq0=yq=He9q8qqQ8frFve9Fve9Ff0dmeaabaqaciaaciGaaeqabaWaaeaaeaaakeaacqaHdpWCcqGH9aqpcaaIYaGaaiOlaiaaiwdacaqGGaGaaeyEaiaabwgacaqGHbGaaeOCaiaabohaaaa@3FCC@ .

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01:08

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Answer 2

Textbook Question

Chapter 9, Problem 1SE

Ages A study of all the students at a small college showed a mean age of 20.7 and a standard deviation of 2.5 years.

a. Are these numbers statistics or parameters? Explain.

b. Label both numbers with their appropriate symbol (such as x ¯ , μ , s , or σ ).

Definition Definition Measure of central tendency that is the average of a given data set. The mean value is evaluated as the quotient of the sum of all observations by the sample size. The mean, in contrast to a median, is affected by extreme values. Very large or very small values can distract the mean from the center of the data. Arithmetic mean: The most common type of mean is the arithmetic mean. It is evaluated using the formula: μ = 1 N ∑ i = 1 N x i Other types of means are the geometric mean, logarithmic mean, and harmonic mean. Geometric mean: The nth root of the product of n observations from a data set is defined as the geometric mean of the set: G = x 1 x 2 ... x n n Logarithmic mean: The difference of the natural logarithms of the two numbers, divided by the difference between the numbers is the logarithmic mean of the two numbers. The logarithmic mean is used particularly in heat transfer and mass transfer. ln x 2 − ln x 1 x 2 − x 1 Harmonic mean: The inverse of the arithmetic mean of the inverses of all the numbers in a data set is the harmonic mean of the data. 1 1 x 1 + 1 x 2 + ...

a .

Expert Solution

To determine

Identify if the given numbers are statistics or parameters.

Answer to Problem 1SE

The given numbers are parameters.

Explanation of Solution

It is given that the study of all students in the small college showed mean age of 20.7 years and standard deviation of 2.5 years.

The numerical characteristic of the population and sample are called parameter and statistic, respectively.

The study considered all the students, which can be referred to as the population. Thus, 20.7 years is the population mean and 2.5 years is the population standard deviation. So, the given numbers are characteristics of the population.

Therefore, the given numbers are parameters.

b .

Expert Solution

To determine

Identify the appropriate symbols for the given numbers.

Answer to Problem 1SE

The numbers can be labelled as " $ " μ=20.7 yearsMathType@MTEF@5@5@+=feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLnhiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr4rNCHbGeaGqiVCI8FfYJH8YrFfeuY=Hhbbf9v8qqaqFr0xc9pk0xbba9q8WqFfea0=yr0RYxir=Jbba9q8aq0=yq=He9q8qqQ8frFve9Fve9Ff0dmeaabaqaciaaciGaaeqabaWaaeaaeaaakeaacqaH8oqBcqGH9aqpcaaIYaGaaGimaiaac6cacaaI3aGaaeiiaiaabMhacaqGLbGaaeyyaiaabkhacaqGZbaaaa@407B@ and " $ " σ=2.5 yearsMathType@MTEF@5@5@+=feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLnhiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr4rNCHbGeaGqiVCI8FfYJH8YrFfeuY=Hhbbf9v8qqaqFr0xc9pk0xbba9q8WqFfea0=yr0RYxir=Jbba9q8aq0=yq=He9q8qqQ8frFve9Fve9Ff0dmeaabaqaciaaciGaaeqabaWaaeaaeaaakeaacqaHdpWCcqGH9aqpcaaIYaGaaiOlaiaaiwdacaqGGaGaaeyEaiaabwgacaqGHbGaaeOCaiaabohaaaa@3FCC@ .

Explanation of Solution

The given numbers 20.7 years and 2.5 years are population mean and population standard deviation of the ages of students in a small college, respectively.

The population mean is denoted by " $ " μMathType@MTEF@5@5@+=feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLnhiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr4rNCHbGeaGqiVCI8FfYJH8YrFfeuY=Hhbbf9v8qqaqFr0xc9pk0xbba9q8WqFfea0=yr0RYxir=Jbba9q8aq0=yq=He9q8qqQ8frFve9Fve9Ff0dmeaabaqaciaaciGaaeqabaWaaeaaeaaakeaacqaH8oqBaaa@3736@ and the population standard deviation is denoted by " $ " σMathType@MTEF@5@5@+=feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLnhiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr4rNCHbGeaGqiVCI8FfYJH8YrFfeuY=Hhbbf9v8qqaqFr0xc9pk0xbba9q8WqFfea0=yr0RYxir=Jbba9q8aq0=yq=He9q8qqQ8frFve9Fve9Ff0dmeaabaqaciaaciGaaeqabaWaaeaaeaaakeaacqaHdpWCaaa@3743@ . Thus, the given numbers can be labelled as " $ " μ=20.7 yearsMathType@MTEF@5@5@+=feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLnhiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr4rNCHbGeaGqiVCI8FfYJH8YrFfeuY=Hhbbf9v8qqaqFr0xc9pk0xbba9q8WqFfea0=yr0RYxir=Jbba9q8aq0=yq=He9q8qqQ8frFve9Fve9Ff0dmeaabaqaciaaciGaaeqabaWaaeaaeaaakeaacqaH8oqBcqGH9aqpcaaIYaGaaGimaiaac6cacaaI3aGaaeiiaiaabMhacaqGLbGaaeyyaiaabkhacaqGZbaaaa@407B@ and " $ " σ=2.5 yearsMathType@MTEF@5@5@+=feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLnhiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr4rNCHbGeaGqiVCI8FfYJH8YrFfeuY=Hhbbf9v8qqaqFr0xc9pk0xbba9q8WqFfea0=yr0RYxir=Jbba9q8aq0=yq=He9q8qqQ8frFve9Fve9Ff0dmeaabaqaciaaciGaaeqabaWaaeaaeaaakeaacqaHdpWCcqGH9aqpcaaIYaGaaiOlaiaaiwdacaqGGaGaaeyEaiaabwgacaqGHbGaaeOCaiaabohaaaa@3FCC@ .

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01:08

Answer 3

Textbook Question

Chapter 9, Problem 1SE

Ages A study of all the students at a small college showed a mean age of 20.7 and a standard deviation of 2.5 years.

a. Are these numbers statistics or parameters? Explain.

b. Label both numbers with their appropriate symbol (such as x ¯ , μ , s , or σ ).

Definition Definition Measure of central tendency that is the average of a given data set. The mean value is evaluated as the quotient of the sum of all observations by the sample size. The mean, in contrast to a median, is affected by extreme values. Very large or very small values can distract the mean from the center of the data. Arithmetic mean: The most common type of mean is the arithmetic mean. It is evaluated using the formula: μ = 1 N ∑ i = 1 N x i Other types of means are the geometric mean, logarithmic mean, and harmonic mean. Geometric mean: The nth root of the product of n observations from a data set is defined as the geometric mean of the set: G = x 1 x 2 ... x n n Logarithmic mean: The difference of the natural logarithms of the two numbers, divided by the difference between the numbers is the logarithmic mean of the two numbers. The logarithmic mean is used particularly in heat transfer and mass transfer. ln x 2 − ln x 1 x 2 − x 1 Harmonic mean: The inverse of the arithmetic mean of the inverses of all the numbers in a data set is the harmonic mean of the data. 1 1 x 1 + 1 x 2 + ...

a .

Expert Solution

To determine

Identify if the given numbers are statistics or parameters.

Answer to Problem 1SE

The given numbers are parameters.

Explanation of Solution

It is given that the study of all students in the small college showed mean age of 20.7 years and standard deviation of 2.5 years.

The numerical characteristic of the population and sample are called parameter and statistic, respectively.

The study considered all the students, which can be referred to as the population. Thus, 20.7 years is the population mean and 2.5 years is the population standard deviation. So, the given numbers are characteristics of the population.

Therefore, the given numbers are parameters.

b .

Expert Solution

To determine

Identify the appropriate symbols for the given numbers.

Answer to Problem 1SE

The numbers can be labelled as " $ " μ=20.7 yearsMathType@MTEF@5@5@+=feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLnhiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr4rNCHbGeaGqiVCI8FfYJH8YrFfeuY=Hhbbf9v8qqaqFr0xc9pk0xbba9q8WqFfea0=yr0RYxir=Jbba9q8aq0=yq=He9q8qqQ8frFve9Fve9Ff0dmeaabaqaciaaciGaaeqabaWaaeaaeaaakeaacqaH8oqBcqGH9aqpcaaIYaGaaGimaiaac6cacaaI3aGaaeiiaiaabMhacaqGLbGaaeyyaiaabkhacaqGZbaaaa@407B@ and " $ " σ=2.5 yearsMathType@MTEF@5@5@+=feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLnhiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr4rNCHbGeaGqiVCI8FfYJH8YrFfeuY=Hhbbf9v8qqaqFr0xc9pk0xbba9q8WqFfea0=yr0RYxir=Jbba9q8aq0=yq=He9q8qqQ8frFve9Fve9Ff0dmeaabaqaciaaciGaaeqabaWaaeaaeaaakeaacqaHdpWCcqGH9aqpcaaIYaGaaiOlaiaaiwdacaqGGaGaaeyEaiaabwgacaqGHbGaaeOCaiaabohaaaa@3FCC@ .

Explanation of Solution

The given numbers 20.7 years and 2.5 years are population mean and population standard deviation of the ages of students in a small college, respectively.

The population mean is denoted by " $ " μMathType@MTEF@5@5@+=feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLnhiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr4rNCHbGeaGqiVCI8FfYJH8YrFfeuY=Hhbbf9v8qqaqFr0xc9pk0xbba9q8WqFfea0=yr0RYxir=Jbba9q8aq0=yq=He9q8qqQ8frFve9Fve9Ff0dmeaabaqaciaaciGaaeqabaWaaeaaeaaakeaacqaH8oqBaaa@3736@ and the population standard deviation is denoted by " $ " σMathType@MTEF@5@5@+=feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLnhiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr4rNCHbGeaGqiVCI8FfYJH8YrFfeuY=Hhbbf9v8qqaqFr0xc9pk0xbba9q8WqFfea0=yr0RYxir=Jbba9q8aq0=yq=He9q8qqQ8frFve9Fve9Ff0dmeaabaqaciaaciGaaeqabaWaaeaaeaaakeaacqaHdpWCaaa@3743@ . Thus, the given numbers can be labelled as " $ " μ=20.7 yearsMathType@MTEF@5@5@+=feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLnhiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr4rNCHbGeaGqiVCI8FfYJH8YrFfeuY=Hhbbf9v8qqaqFr0xc9pk0xbba9q8WqFfea0=yr0RYxir=Jbba9q8aq0=yq=He9q8qqQ8frFve9Fve9Ff0dmeaabaqaciaaciGaaeqabaWaaeaaeaaakeaacqaH8oqBcqGH9aqpcaaIYaGaaGimaiaac6cacaaI3aGaaeiiaiaabMhacaqGLbGaaeyyaiaabkhacaqGZbaaaa@407B@ and " $ " σ=2.5 yearsMathType@MTEF@5@5@+=feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLnhiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr4rNCHbGeaGqiVCI8FfYJH8YrFfeuY=Hhbbf9v8qqaqFr0xc9pk0xbba9q8WqFfea0=yr0RYxir=Jbba9q8aq0=yq=He9q8qqQ8frFve9Fve9Ff0dmeaabaqaciaaciGaaeqabaWaaeaaeaaakeaacqaHdpWCcqGH9aqpcaaIYaGaaiOlaiaaiwdacaqGGaGaaeyEaiaabwgacaqGHbGaaeOCaiaabohaaaa@3FCC@ .

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01:08

Answer 4

Textbook Question

Chapter 9, Problem 1SE

Ages A study of all the students at a small college showed a mean age of 20.7 and a standard deviation of 2.5 years.

a. Are these numbers statistics or parameters? Explain.

b. Label both numbers with their appropriate symbol (such as x ¯ , μ , s , or σ ).

Definition Definition Measure of central tendency that is the average of a given data set. The mean value is evaluated as the quotient of the sum of all observations by the sample size. The mean, in contrast to a median, is affected by extreme values. Very large or very small values can distract the mean from the center of the data. Arithmetic mean: The most common type of mean is the arithmetic mean. It is evaluated using the formula: μ = 1 N ∑ i = 1 N x i Other types of means are the geometric mean, logarithmic mean, and harmonic mean. Geometric mean: The nth root of the product of n observations from a data set is defined as the geometric mean of the set: G = x 1 x 2 ... x n n Logarithmic mean: The difference of the natural logarithms of the two numbers, divided by the difference between the numbers is the logarithmic mean of the two numbers. The logarithmic mean is used particularly in heat transfer and mass transfer. ln x 2 − ln x 1 x 2 − x 1 Harmonic mean: The inverse of the arithmetic mean of the inverses of all the numbers in a data set is the harmonic mean of the data. 1 1 x 1 + 1 x 2 + ...

a .

Expert Solution

To determine

Identify if the given numbers are statistics or parameters.

Answer to Problem 1SE

The given numbers are parameters.

Explanation of Solution

It is given that the study of all students in the small college showed mean age of 20.7 years and standard deviation of 2.5 years.

The numerical characteristic of the population and sample are called parameter and statistic, respectively.

The study considered all the students, which can be referred to as the population. Thus, 20.7 years is the population mean and 2.5 years is the population standard deviation. So, the given numbers are characteristics of the population.

Therefore, the given numbers are parameters.

b .

Expert Solution

To determine

Identify the appropriate symbols for the given numbers.

Answer to Problem 1SE

The numbers can be labelled as " $ " μ=20.7 yearsMathType@MTEF@5@5@+=feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLnhiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr4rNCHbGeaGqiVCI8FfYJH8YrFfeuY=Hhbbf9v8qqaqFr0xc9pk0xbba9q8WqFfea0=yr0RYxir=Jbba9q8aq0=yq=He9q8qqQ8frFve9Fve9Ff0dmeaabaqaciaaciGaaeqabaWaaeaaeaaakeaacqaH8oqBcqGH9aqpcaaIYaGaaGimaiaac6cacaaI3aGaaeiiaiaabMhacaqGLbGaaeyyaiaabkhacaqGZbaaaa@407B@ and " $ " σ=2.5 yearsMathType@MTEF@5@5@+=feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLnhiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr4rNCHbGeaGqiVCI8FfYJH8YrFfeuY=Hhbbf9v8qqaqFr0xc9pk0xbba9q8WqFfea0=yr0RYxir=Jbba9q8aq0=yq=He9q8qqQ8frFve9Fve9Ff0dmeaabaqaciaaciGaaeqabaWaaeaaeaaakeaacqaHdpWCcqGH9aqpcaaIYaGaaiOlaiaaiwdacaqGGaGaaeyEaiaabwgacaqGHbGaaeOCaiaabohaaaa@3FCC@ .

Explanation of Solution

The given numbers 20.7 years and 2.5 years are population mean and population standard deviation of the ages of students in a small college, respectively.

The population mean is denoted by " $ " μMathType@MTEF@5@5@+=feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLnhiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr4rNCHbGeaGqiVCI8FfYJH8YrFfeuY=Hhbbf9v8qqaqFr0xc9pk0xbba9q8WqFfea0=yr0RYxir=Jbba9q8aq0=yq=He9q8qqQ8frFve9Fve9Ff0dmeaabaqaciaaciGaaeqabaWaaeaaeaaakeaacqaH8oqBaaa@3736@ and the population standard deviation is denoted by " $ " σMathType@MTEF@5@5@+=feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLnhiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr4rNCHbGeaGqiVCI8FfYJH8YrFfeuY=Hhbbf9v8qqaqFr0xc9pk0xbba9q8WqFfea0=yr0RYxir=Jbba9q8aq0=yq=He9q8qqQ8frFve9Fve9Ff0dmeaabaqaciaaciGaaeqabaWaaeaaeaaakeaacqaHdpWCaaa@3743@ . Thus, the given numbers can be labelled as " $ " μ=20.7 yearsMathType@MTEF@5@5@+=feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLnhiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr4rNCHbGeaGqiVCI8FfYJH8YrFfeuY=Hhbbf9v8qqaqFr0xc9pk0xbba9q8WqFfea0=yr0RYxir=Jbba9q8aq0=yq=He9q8qqQ8frFve9Fve9Ff0dmeaabaqaciaaciGaaeqabaWaaeaaeaaakeaacqaH8oqBcqGH9aqpcaaIYaGaaGimaiaac6cacaaI3aGaaeiiaiaabMhacaqGLbGaaeyyaiaabkhacaqGZbaaaa@407B@ and " $ " σ=2.5 yearsMathType@MTEF@5@5@+=feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLnhiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr4rNCHbGeaGqiVCI8FfYJH8YrFfeuY=Hhbbf9v8qqaqFr0xc9pk0xbba9q8WqFfea0=yr0RYxir=Jbba9q8aq0=yq=He9q8qqQ8frFve9Fve9Ff0dmeaabaqaciaaciGaaeqabaWaaeaaeaaakeaacqaHdpWCcqGH9aqpcaaIYaGaaiOlaiaaiwdacaqGGaGaaeyEaiaabwgacaqGHbGaaeOCaiaabohaaaa@3FCC@ .

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01:08

Answer 5

Textbook Question

Answer 6

Textbook Question

Answer 7

a .

Expert Solution

To determine

Identify if the given numbers are statistics or parameters.

Answer to Problem 1SE

The given numbers are parameters.

Explanation of Solution

It is given that the study of all students in the small college showed mean age of 20.7 years and standard deviation of 2.5 years.

The numerical characteristic of the population and sample are called parameter and statistic, respectively.

The study considered all the students, which can be referred to as the population. Thus, 20.7 years is the population mean and 2.5 years is the population standard deviation. So, the given numbers are characteristics of the population.

Therefore, the given numbers are parameters.

b .

Expert Solution

To determine

Identify the appropriate symbols for the given numbers.

Answer to Problem 1SE

The numbers can be labelled as " $ " μ=20.7 yearsMathType@MTEF@5@5@+=feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLnhiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr4rNCHbGeaGqiVCI8FfYJH8YrFfeuY=Hhbbf9v8qqaqFr0xc9pk0xbba9q8WqFfea0=yr0RYxir=Jbba9q8aq0=yq=He9q8qqQ8frFve9Fve9Ff0dmeaabaqaciaaciGaaeqabaWaaeaaeaaakeaacqaH8oqBcqGH9aqpcaaIYaGaaGimaiaac6cacaaI3aGaaeiiaiaabMhacaqGLbGaaeyyaiaabkhacaqGZbaaaa@407B@ and " $ " σ=2.5 yearsMathType@MTEF@5@5@+=feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLnhiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr4rNCHbGeaGqiVCI8FfYJH8YrFfeuY=Hhbbf9v8qqaqFr0xc9pk0xbba9q8WqFfea0=yr0RYxir=Jbba9q8aq0=yq=He9q8qqQ8frFve9Fve9Ff0dmeaabaqaciaaciGaaeqabaWaaeaaeaaakeaacqaHdpWCcqGH9aqpcaaIYaGaaiOlaiaaiwdacaqGGaGaaeyEaiaabwgacaqGHbGaaeOCaiaabohaaaa@3FCC@ .

Explanation of Solution

The given numbers 20.7 years and 2.5 years are population mean and population standard deviation of the ages of students in a small college, respectively.

The population mean is denoted by " $ " μMathType@MTEF@5@5@+=feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLnhiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr4rNCHbGeaGqiVCI8FfYJH8YrFfeuY=Hhbbf9v8qqaqFr0xc9pk0xbba9q8WqFfea0=yr0RYxir=Jbba9q8aq0=yq=He9q8qqQ8frFve9Fve9Ff0dmeaabaqaciaaciGaaeqabaWaaeaaeaaakeaacqaH8oqBaaa@3736@ and the population standard deviation is denoted by " $ " σMathType@MTEF@5@5@+=feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLnhiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr4rNCHbGeaGqiVCI8FfYJH8YrFfeuY=Hhbbf9v8qqaqFr0xc9pk0xbba9q8WqFfea0=yr0RYxir=Jbba9q8aq0=yq=He9q8qqQ8frFve9Fve9Ff0dmeaabaqaciaaciGaaeqabaWaaeaaeaaakeaacqaHdpWCaaa@3743@ . Thus, the given numbers can be labelled as " $ " μ=20.7 yearsMathType@MTEF@5@5@+=feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLnhiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr4rNCHbGeaGqiVCI8FfYJH8YrFfeuY=Hhbbf9v8qqaqFr0xc9pk0xbba9q8WqFfea0=yr0RYxir=Jbba9q8aq0=yq=He9q8qqQ8frFve9Fve9Ff0dmeaabaqaciaaciGaaeqabaWaaeaaeaaakeaacqaH8oqBcqGH9aqpcaaIYaGaaGimaiaac6cacaaI3aGaaeiiaiaabMhacaqGLbGaaeyyaiaabkhacaqGZbaaaa@407B@ and " $ " σ=2.5 yearsMathType@MTEF@5@5@+=feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLnhiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr4rNCHbGeaGqiVCI8FfYJH8YrFfeuY=Hhbbf9v8qqaqFr0xc9pk0xbba9q8WqFfea0=yr0RYxir=Jbba9q8aq0=yq=He9q8qqQ8frFve9Fve9Ff0dmeaabaqaciaaciGaaeqabaWaaeaaeaaakeaacqaHdpWCcqGH9aqpcaaIYaGaaiOlaiaaiwdacaqGGaGaaeyEaiaabwgacaqGHbGaaeOCaiaabohaaaa@3FCC@ .

Answer 8

a .

Expert Solution

To determine

Identify if the given numbers are statistics or parameters.

Answer to Problem 1SE

The given numbers are parameters.

Explanation of Solution

It is given that the study of all students in the small college showed mean age of 20.7 years and standard deviation of 2.5 years.

The numerical characteristic of the population and sample are called parameter and statistic, respectively.

The study considered all the students, which can be referred to as the population. Thus, 20.7 years is the population mean and 2.5 years is the population standard deviation. So, the given numbers are characteristics of the population.

Therefore, the given numbers are parameters.

Answer 9

a .

Expert Solution

Answer 10

a .

Expert Solution

Answer 11

Expert Solution

Answer 12

To determine

Identify if the given numbers are statistics or parameters.

Answer 13

Answer to Problem 1SE

The given numbers are parameters.

Answer 14

Explanation of Solution

It is given that the study of all students in the small college showed mean age of 20.7 years and standard deviation of 2.5 years.

The numerical characteristic of the population and sample are called parameter and statistic, respectively.

The study considered all the students, which can be referred to as the population. Thus, 20.7 years is the population mean and 2.5 years is the population standard deviation. So, the given numbers are characteristics of the population.

Therefore, the given numbers are parameters.

Answer 15

b .

Expert Solution

To determine

Identify the appropriate symbols for the given numbers.

Answer to Problem 1SE

The numbers can be labelled as " $ " μ=20.7 yearsMathType@MTEF@5@5@+=feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLnhiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr4rNCHbGeaGqiVCI8FfYJH8YrFfeuY=Hhbbf9v8qqaqFr0xc9pk0xbba9q8WqFfea0=yr0RYxir=Jbba9q8aq0=yq=He9q8qqQ8frFve9Fve9Ff0dmeaabaqaciaaciGaaeqabaWaaeaaeaaakeaacqaH8oqBcqGH9aqpcaaIYaGaaGimaiaac6cacaaI3aGaaeiiaiaabMhacaqGLbGaaeyyaiaabkhacaqGZbaaaa@407B@ and " $ " σ=2.5 yearsMathType@MTEF@5@5@+=feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLnhiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr4rNCHbGeaGqiVCI8FfYJH8YrFfeuY=Hhbbf9v8qqaqFr0xc9pk0xbba9q8WqFfea0=yr0RYxir=Jbba9q8aq0=yq=He9q8qqQ8frFve9Fve9Ff0dmeaabaqaciaaciGaaeqabaWaaeaaeaaakeaacqaHdpWCcqGH9aqpcaaIYaGaaiOlaiaaiwdacaqGGaGaaeyEaiaabwgacaqGHbGaaeOCaiaabohaaaa@3FCC@ .

Explanation of Solution

The given numbers 20.7 years and 2.5 years are population mean and population standard deviation of the ages of students in a small college, respectively.

The population mean is denoted by " $ " μMathType@MTEF@5@5@+=feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLnhiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr4rNCHbGeaGqiVCI8FfYJH8YrFfeuY=Hhbbf9v8qqaqFr0xc9pk0xbba9q8WqFfea0=yr0RYxir=Jbba9q8aq0=yq=He9q8qqQ8frFve9Fve9Ff0dmeaabaqaciaaciGaaeqabaWaaeaaeaaakeaacqaH8oqBaaa@3736@ and the population standard deviation is denoted by " $ " σMathType@MTEF@5@5@+=feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLnhiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr4rNCHbGeaGqiVCI8FfYJH8YrFfeuY=Hhbbf9v8qqaqFr0xc9pk0xbba9q8WqFfea0=yr0RYxir=Jbba9q8aq0=yq=He9q8qqQ8frFve9Fve9Ff0dmeaabaqaciaaciGaaeqabaWaaeaaeaaakeaacqaHdpWCaaa@3743@ . Thus, the given numbers can be labelled as " $ " μ=20.7 yearsMathType@MTEF@5@5@+=feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLnhiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr4rNCHbGeaGqiVCI8FfYJH8YrFfeuY=Hhbbf9v8qqaqFr0xc9pk0xbba9q8WqFfea0=yr0RYxir=Jbba9q8aq0=yq=He9q8qqQ8frFve9Fve9Ff0dmeaabaqaciaaciGaaeqabaWaaeaaeaaakeaacqaH8oqBcqGH9aqpcaaIYaGaaGimaiaac6cacaaI3aGaaeiiaiaabMhacaqGLbGaaeyyaiaabkhacaqGZbaaaa@407B@ and " $ " σ=2.5 yearsMathType@MTEF@5@5@+=feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLnhiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr4rNCHbGeaGqiVCI8FfYJH8YrFfeuY=Hhbbf9v8qqaqFr0xc9pk0xbba9q8WqFfea0=yr0RYxir=Jbba9q8aq0=yq=He9q8qqQ8frFve9Fve9Ff0dmeaabaqaciaaciGaaeqabaWaaeaaeaaakeaacqaHdpWCcqGH9aqpcaaIYaGaaiOlaiaaiwdacaqGGaGaaeyEaiaabwgacaqGHbGaaeOCaiaabohaaaa@3FCC@ .

Answer 16

b .

Expert Solution

Answer 17

b .

Expert Solution

Answer 18

Expert Solution

Answer 19

To determine

Identify the appropriate symbols for the given numbers.

Answer 20

Answer to Problem 1SE

The numbers can be labelled as " $ " μ=20.7 yearsMathType@MTEF@5@5@+=feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLnhiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr4rNCHbGeaGqiVCI8FfYJH8YrFfeuY=Hhbbf9v8qqaqFr0xc9pk0xbba9q8WqFfea0=yr0RYxir=Jbba9q8aq0=yq=He9q8qqQ8frFve9Fve9Ff0dmeaabaqaciaaciGaaeqabaWaaeaaeaaakeaacqaH8oqBcqGH9aqpcaaIYaGaaGimaiaac6cacaaI3aGaaeiiaiaabMhacaqGLbGaaeyyaiaabkhacaqGZbaaaa@407B@ and " $ " σ=2.5 yearsMathType@MTEF@5@5@+=feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLnhiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr4rNCHbGeaGqiVCI8FfYJH8YrFfeuY=Hhbbf9v8qqaqFr0xc9pk0xbba9q8WqFfea0=yr0RYxir=Jbba9q8aq0=yq=He9q8qqQ8frFve9Fve9Ff0dmeaabaqaciaaciGaaeqabaWaaeaaeaaakeaacqaHdpWCcqGH9aqpcaaIYaGaaiOlaiaaiwdacaqGGaGaaeyEaiaabwgacaqGHbGaaeOCaiaabohaaaa@3FCC@ .

Answer 21

Explanation of Solution

The given numbers 20.7 years and 2.5 years are population mean and population standard deviation of the ages of students in a small college, respectively.

The population mean is denoted by " $ " μMathType@MTEF@5@5@+=feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLnhiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr4rNCHbGeaGqiVCI8FfYJH8YrFfeuY=Hhbbf9v8qqaqFr0xc9pk0xbba9q8WqFfea0=yr0RYxir=Jbba9q8aq0=yq=He9q8qqQ8frFve9Fve9Ff0dmeaabaqaciaaciGaaeqabaWaaeaaeaaakeaacqaH8oqBaaa@3736@ and the population standard deviation is denoted by " $ " σMathType@MTEF@5@5@+=feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLnhiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr4rNCHbGeaGqiVCI8FfYJH8YrFfeuY=Hhbbf9v8qqaqFr0xc9pk0xbba9q8WqFfea0=yr0RYxir=Jbba9q8aq0=yq=He9q8qqQ8frFve9Fve9Ff0dmeaabaqaciaaciGaaeqabaWaaeaaeaaakeaacqaHdpWCaaa@3743@ . Thus, the given numbers can be labelled as " $ " μ=20.7 yearsMathType@MTEF@5@5@+=feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLnhiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr4rNCHbGeaGqiVCI8FfYJH8YrFfeuY=Hhbbf9v8qqaqFr0xc9pk0xbba9q8WqFfea0=yr0RYxir=Jbba9q8aq0=yq=He9q8qqQ8frFve9Fve9Ff0dmeaabaqaciaaciGaaeqabaWaaeaaeaaakeaacqaH8oqBcqGH9aqpcaaIYaGaaGimaiaac6cacaaI3aGaaeiiaiaabMhacaqGLbGaaeyyaiaabkhacaqGZbaaaa@407B@ and " $ " σ=2.5 yearsMathType@MTEF@5@5@+=feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLnhiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr4rNCHbGeaGqiVCI8FfYJH8YrFfeuY=Hhbbf9v8qqaqFr0xc9pk0xbba9q8WqFfea0=yr0RYxir=Jbba9q8aq0=yq=He9q8qqQ8frFve9Fve9Ff0dmeaabaqaciaaciGaaeqabaWaaeaaeaaakeaacqaHdpWCcqGH9aqpcaaIYaGaaiOlaiaaiwdacaqGGaGaaeyEaiaabwgacaqGHbGaaeOCaiaabohaaaa@3FCC@ .

Answer 22

Ch. 9 - Ages A study of all the students at a small...Ch. 9 - Units A survey of 100 random full-time students at...Ch. 9 - Exam Scores The distribution of the scores on a...Ch. 9 - Exam Scores The distribution of the scores on a...Ch. 9 - Prob. 5SE Ch. 9 - Cellphone Calls Answers.com claims that the mean...Ch. 9 - Retirement Income Several times during the year,...Ch. 9 - Time Employed A human resources manager for a...Ch. 9 - Prob. 9SE Ch. 9 - Prob. 10SE

Ages A study of all the students at a small college showed a mean age of 20.7 and a standard deviation of 2.5 years. a. Are these numbers statistics or parameters? Explain. b. Label both numbers with their appropriate symbol (such as x ¯ , μ , s , or σ ).

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Answer to Problem 1SE

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Answer to Problem 1SE

Explanation of Solution

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