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Essentials of Statistics for the B...

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

Solutions

Chapter
Section
BuyFindarrow_forward

Essentials of Statistics for the B...

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

What proportion of a normal distribution is located between each of the following z-score boundaries?

a. z = −0.25 and z =  +0.25

b. z = −0.67 and z = +0.67

c. z = −1.20 and z = +1.20

a.

To determine

To find: The proportion between z=±0.25.

Explanation

Given info:

The standard normal distribution with z=0.25 and z=0.25

Calculation:

P(0.25<z<0.25)=P(z<0.25)P(z>0

b.

To determine

To find: The proportion between z=±0.67

c.

To determine

To find: The proportion between z1=±1.20.

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