Chapter 4, Problem 13P

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8th Edition

Frederick J Gravetter + 1 other

ISBN: 9781133956570

Textbook Problem

A population has a mean of μ = 30 and a standard deviation of σ = 5.

- a. If 5 points were added to every score in the population, what would be the new values for the mean and standard deviation?
- b. If every score in the population were multiplied by 3, what would he the new values for the mean and standard deviation?

**a.**

To determine

**To find:** The new values for the mean and standard deviation for the population scores, adding 5 points to each of the population scores.

Explanation

**Given info:**

The data represents the mean and standard deviation for the population .the population has mean and population standard deviation are 30, 5.

**Calculation:**

*New mean:*

If n points added to every score in population, the new value for mean is,

The new mean for the population of scores is,

**b.**

To determine

**To find:** The new values for the mean and standard deviation for the population scores, multiplied 3 points to each of the population scores.

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