Question

Solve the following problems. a. After 6 points have been added to every score in a sample, the mean is found to be $M=70$ and the standard deviation is $s=13 .$ What were the values for the mean and standard deviation for the original sample? b. After every score in a sample is multiplied by $3,$ the mean is found to be $M=48$ and the standard deviation is $s=18 .$ What were the values for the mean and standard deviation for the original sample?

          Solve the following problems.
a. After 6 points have been added to every score in a sample, the mean is found to be $M=70$ and the standard deviation is $s=13 .$ What were the values for the mean and standard deviation for the original sample?
b. After every score in a sample is multiplied by $3,$ the mean is found to be $M=48$ and the standard deviation is $s=18 .$ What were the values for the mean and standard deviation for the original sample?

Added by Jonathan R.

Elementary Statistics a Step by Step Approach

Allan G. Bluman 9th Edition

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Solved by Expert Rashmi Sinha

01/30/2022

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We need to find the values for the mean and standard deviation for the original sample. Show more…

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Solve the following problems. a. After 6 points have been added to every score in a sample, the mean is found to be $M=70$ and the standard deviation is $s=13 .$ What were the values for the mean and standard deviation for the original sample? b. After every score in a sample is multiplied by $3,$ the mean is found to be $M=48$ and the standard deviation is $s=18 .$ What were the values for the mean and standard deviation for the original sample?