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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

Find each of the following probabilities for a normal distribution.

  • a. p(z > 1.25)
  • b. p(z > −0.60)
  • c. p(z < 0.70)
  • d. p(z < − 1.30)

a.

To determine

To find: p(z>1.25)

Explanation

Given info:

The distribution follows normal.

Calculation:

Let, p is the probability that score obtained is greater than 1.25. Then,

p(z>1.25)=1p(z<1.25)

The area under the curve from z-table is p(z<1.25)=0.8944.

Hence,

P(z>1.25)=1P(z<1.25)

b.

To determine

To find: P(z>0.60).

c.

To determine

To find: P(z<0.70)

d.

To determine
P(z<1.3)

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