   Chapter 3, Problem 10P Essentials of Statistics for the B...

8th Edition
Frederick J Gravetter + 1 other
ISBN: 9781133956570

Solutions

Chapter
Section Essentials of Statistics for the B...

8th Edition
Frederick J Gravetter + 1 other
ISBN: 9781133956570
Textbook Problem

A sample of n = 7 scores has a mean of M = 9. If one new person with a score of X = 1 is added to the sample, what is the value for the new mean?

To determine

To Find: The value of new sample mean when a new score with a value equal to 1 is added.

Explanation

Given info:

A sample of 7 scores has mean 9.

Calculations:

The formula for sum of scores, X can be derived from sample mean as:

M=XnX=M×n

Substitute the values M=9,n=7 in the formula

X=7×9=63

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