   Chapter 4, Problem 7P 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

On an exam with a mean of M = 78, you obtain a score of X = 84. a. Would you prefer a standard deviation of s = 2 or s = 10? (Hint: Sketch each distribution and find the location of your score.) b. If your score were X = 72, would you prefer s = 2 or s = 10? Explain your answer.

(a)

To determine

To Explain: Which value of standard deviation is appropriate s=2 or s=10

Explanation

Given info:

The mean of an exam is 78. A score of 84 is obtained.

Calculation:

For the given deviation s=2, the z-score is:

z=XMs=84782=3

Similarly, for the given deviation

(b)

To determine

To Explain: Which value of standard deviation is appropriate s=2 or s=10

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