Chapter 4.5, Problem 3LC

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8th Edition

Frederick J Gravetter + 1 other

ISBN: 9781133956570

Textbook Problem

A population has a mean of μ. = 70 and a standard deviation of σ = 5.

**a.**If 10 points were added to every score in the population, what would be the new values for the population mean and standard deviation?**b.**If every score in the population were multiplied by 2, what would be the new values for the population mean and standard deviation?

**(a)**

To determine

**To Find:** Thenew values for the population mean and standard deviation, when the 10 points were added to every score in the population.

Explanation

**Given info:**

The population has mean

**Calculation:**

If n points added to every score in population, the value of meanis,

If n points added to every score in population, the value of standard deviationis,

That is, standard deviation will remain same

**(b)**

To determine

**To Find:** Thenew values for the mean and standard deviation, when the 2 points were multiplied by every score in the population.

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