12th Edition

ISBN: 9780321836960

Author: Mario F. Triola

Publisher: PEARSON

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In mathematics, everyone must have heard the term average in one place or other. Almost all types of calculation require taking out an average. In everyday life, the term is used for denoting a certain amount that can be said to be a typical quantity for…

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Chapter 1.3, Problem 9BSC

In Exercises 5-12, determine whether the given value is a statistic or a parameter.

9. IQ Scores The mean IQ score for subjects taking the Wechsler Adult Intelligence Scale IQ test is 100.

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 + ...

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Chapter 1.3, Problem 8BSC

Chapter 1.3, Problem 10BSC

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Chapter 1 Solutions

Elementary Statistics

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In Exercises 5-12, determine whether the given value is a statistic or a parameter. 9. IQ Scores The mean IQ score for subjects taking the Wechsler Adult Intelligence Scale IQ test is 100.

Solution Summary: The author explains that the value represents the mean IQ score for subjects taking the Wechsler Adult Intelligence Scale

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