Answer to Question #310161 in Statistics and Probability for Pyralus

Question

A. Find each of the following percentile points under the normal curve.

3. P74

4. P81

Answer 1

Solution

A standard normal curve has $\mu =0$ and $\sigma =1$

Z values for different percentiles can be found from the standard distribution tables.

(a) P74 $=0.74$

Z value for $p(0.74) =0.64$

(b) P81 $=0.81$

Z value for $p(0.81) = 0.88$