Chapter 4, Problem 7P

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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

Explanation

**Given info:**

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

**Calculation:**

For the given deviation

Similarly, for the given deviation

**(b)**

To determine

**To Explain:** Which value of standard deviation is appropriate

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