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Essentials of Statistics for the B...

8th Edition
Frederick J Gravetter + 1 other
ISBN: 9781133956570

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BuyFindarrow_forward

Essentials of Statistics for the B...

8th Edition
Frederick J Gravetter + 1 other
ISBN: 9781133956570
Textbook Problem

For a distribution with µ = 40 and σ = 12, find the X value corresponding to each of the following z-scores.

a. z = 1.50    b. z = –1.25    c. z = 1/3

(a)

To determine

To Find: The X value for z-score = 1.50.

Explanation

Given Info:

The population has mean μ=40 and standard deviation σ=12.

The z-score is 1.50.

Calculation:

The X value corresponding to z=1.50 can be obtained as follows:

The formula for specified value of X is,

X=μ+z×σ

Substitute μ=40, σ=12

(b)

To determine

To Find: The X value for z-score = –1.25.

(c)

To determine

To Find: The X value for z-score =13.

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