A sample has a mean of 115 and a standard deviation of 22. According to Chebyshev's Theorem, (1-1/k2) *100%, at least 75% of the data will fall between what two values? A) 49 - 181 B) 93-137 C) 71-159 D) 105-125

Q: The mean and standard deviation of 200 items are found to be 60 and 20 respectively. If at the time…

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Q: A population has a mean of u = 50, and a standard deviation of  a = 10. a] If 3 points were added to…

A: a.Let X be the scores of the population. If 3 is added to every score the new values will be X…

Q: A sample of 12 measurements has a mean of 40 and a standard deviation of 2.25. Suppose that the…

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Q: A data set lists weights​ (lb) of plastic discarded by households. The highest weight is 5.13 ​lb,…

A: Given data: The highest weight = 5.13 ​lb, mean of all of the weights :  X =2.181 ​lb standard…

Q: A population has a mean of u = 50 and a standard deviation of o = 10. a. If 3 points were added to…

A: A population has a mean of μ= 50 and a standard deviation of σ = 10.

Q: ren population parameters for two populations, population 1 has a mean of 300 and a stan ndard…

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Q: A sample of 12 measurements has a mean of 34 and a standard deviation of 2.5. Suppose that the…

A: Given: The sample of measurements are n=12 Let X represents the measurements The mean of the 12…

Q: The brain volumes (cm³) of 20 brains have a mean of 1090.8 cm³ and a standard deviation of 122.2…

A: The mean is 1090.8  and a standard deviation is 122.2 .

Q: Given population parameters for two populations, population 1 has a mean of 800 and a standard…

A: We have to find given data.

Q: Suppose I collect test data from two different tests, History and Calculus. Suppose the history…

A: Obtain the Z-score for the History class test.Consider the values of history test be denoted by xi,…

Q: Given population parameters for two populations, population 1 has a mean of 300 and a standard…

A: (a) Obtain the coefficient of variation for population 1. The coefficient of variation for…

Q: 1) Suppose that 1,000 students took a Math examination wherein the maximum score that they can…

A: We assume that the score of the 1000 students is normally distributed with mean 70 and standard…

Q: A sample of 12 measurements has a mean of 25 and a standard deviation of 2.75. Suppose that the…

A: Given,Mean of 12 measurements =25Mean=Sum of observationsTotal no of observations25=Sum of…

Q: A population has a mean of u deviation of o = 10. a. If 3 points were added to every score in the…

A: (a) The population has mean 50 and population standard deviation 10. Calculation: If n points added…

Q: A population of scores has u=55 and o=15.  if 5 points are subtracted from every score in the…

A: The given data is μ = 55σ = 15 Suppose x1, x2, x3, x4, ..., xn are the data points…

Q: A sample of 12 measurements has a mean of 24 and a standard deviation of 2. Suppose that the sample…

A: A sample of 12 measurements has a mean of 24 and a standard deviation of 2. n=12,  x¯=24 s=2 Suppose…

Q: 7. A population has a mean of p = 60 and a standard deviation of o - 12. 1. For this population,…

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Q: Example 10.9 Assume that the standard deviation o is 300 and n is 25. Calculate the standard error…

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Q: Given population parameters for two populations, population 1 has a mean of 500 and a standard…

A: We have to find given data.

Q: A sample of 12 measurements has a mean of 29 and a standard deviation of 3. Suppose that the sample…

A: Given: The sample of measurements are n=12. Let X represents the measurements. The mean of the 12…

Q: IQ scores have a mean of 100 and a standard deviation of 15.  Kelly Stewart has an IQ 0f 130.…

A: Given data: Kelly Stewart has an IQ score, X = 130. Mean of IQ scores = 100 Standard deviation of IQ…

Q: Chebyshev's Theorem states that for any set of numbers, the fraction that will like within k…

A: Chebyshev's Theorem states that for any set of numbers, the fraction that will like within k…

Q: A sample of 12 measurements has a mean of 24 and a standard deviation of 3.75. Suppose that the…

A: Given, Mean of 12 measurements=24=sum of 12 measurements12=24sum of 12 measurements=24*12=288…

Q: A different investor decides to invest $8000 in Fund A and $3000 in Fund B. Assuming the amounts…

A: Here's how to proceed:### 1. Investment DetailsYou've mentioned investments of $8000 in Fund A and…

Q: Given population parameters for two populations, population 1 has a mean of 500 and a standard…

A: Given Information: Population 1: Mean μ= 500 Standard deviation σ= 50 Population 2: Mean μ= 21,000…

Q: A population of scores has u = 50 and o = 5. If every score in the population is multiplied by 3,…

A: If a constant value multiplies to each score in distribution, then the mean and standard deviation…

Q: A sample of 12 measurements has a mean of 31 and a standard deviation of 2.75. Suppose that the…

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Q: A sample ofn 25 scores has a mean of M = 11. If each score in the sample multiplied by 6, then what…

A: Given information: n=25Old mean=11 Sum of 25 scores=Number of scores×Mean of scores =25*11=275

Q: Roll the correct die 100 times. Find:   a) the average of the dropped points Enter the exact…

A: (a). Find the average of the dropped points: Denote Xi as the number shown in the ith role of the…

Q: A population has a mean of u=50 and a standard deviation of 0=10. If 3 points were added to every…

A: The properties of mean are:E(X + a) = E( X ) + a * E(X+a)=E(X)+aE(aX)=aE(X)The property of variance…

Q: A variable is normally distributed with mean 12 and standard deviation 4 a.) find the percentage of…

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Q: A random variable X has a mean of 120 and a standard deviation of 15. A random variable Y has a mean…

A: Given that, X¯ = 120σX = 15Y¯ = 100σY = 9 X and Y are independent

Q: A sample of 12 measurements has a mean of 32 and a standard deviation of 3.25. Suppose that the…

A: (A) Sample mass of 12 measurements = ∑i=112×i12=32sum of 12 measurment = ∑i=112×i=32×12=384. After…