   Chapter 4.5, Problem 3LC 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

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 μ=70 and standard deviation σ=5.

Calculation:

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

Population mean = μ+n

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

SD=σ+n=σ

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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