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Essentials of Statistics for the B...

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

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BuyFindarrow_forward

Essentials of Statistics for the B...

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

A sample of n = 9 scores has a mean of M = 13. After one score is added to the sample, the mean is found to be M = 12. What is the value of the score that was added?

To determine

To Find: The value of new score which is added to an original sample of 9 scores.

Explanation

Given info:

A sample of 9 scores has a mean 13. After a new score is added, the new mean is 12.

Calculation:

The formula for the mean is:

M=XnX=M×n

Substitute M=13,n=9 in the formula

X=9×13=117<

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