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Chapter 2: Q.74 (page 135)

The proportion of observations from a standard Normal distribution with values larger than 鈭�0.75is

(a)0.2266. (c) 0.7734. (e) none of these

(b)0.7422. (d) 0.8023.

Short Answer

Expert verified

Correct answer is

(c) 0.7734

Step by step solution

01

 Given information 

Standard Normal distribution with values larger than 鈭�0.75.

We have to find the proportion of observations.

02

Step 2:  Explanation 

Find the probability corresponding to -0.75using table A:

P=0.2266

By comparing 0.2266of all observations, we can see that it is less than -0.75.

The total proportion being 1, this proportion is larger than -0.75, since 1-0.2266=0.7734of all observations.

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