Chapter 6.2, Problem 1LC

Essentials of Statistics for the B...

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

Chapter
Section

Essentials of Statistics for the B...

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

Find the proportion of a normal distribution that corresponds to each of the following sections:a.     z < 0.25b.     z > 0.80c.    z < –1.50d.    z > –0.75

(a)

To determine

To find: The proportion of a normal distribution corresponds to z<0.25.

Explanation

Given info:

The z-score corresponding to left tail is 0.25.

Calculation:

Calculating the probability value by using the EXCEL procedure:

The formula is (=NORMSDIST(z)) to find p(z<0.25) is as follows:

p(z<0

(b)

To determine

To find: The proportion of a normal distribution that corresponds to z>0.80.

(c)

To determine

To find: The proportion of a normal distribution that corresponds to z<1.50.

(d)

To determine

To find: The proportion of a normal distribution that corresponds to z>0.75.

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