Question

Find each of the following percentile points under the normal curve. Complete your procedures and find the corresponding z-score of each problem.

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2. Between z=-0.78 and z=-1.95

2. P32

1. P99

Answer 1

1.

$$P(-1.95<Z<-0.78)$$

$$=P(Z<-0.78)-P(Z\le-1.95)$$

$$\approx0.2176954-0.0255881\approx0.192107$$

2.

$$P(Z<a)=0.32$$

$$a=-0.467699$$

3.

$$P(Z<b)=0.99$$

$$b=2.326348$$