Question

Find the value of z such that 0.9722 of the area lies between −z and z. Round your answer to two decimal places.

Answer 1

Step-by-step explanation: Same as the Original expert answer but it is -2.20 not 2.20.

Answer 2

-2.20 < z < 2.20

Explanation:

You are saying the entire area = 0.9722

so 1 - 0.9722 = 0.0278

then we want it to fit in the middle of the normal curve with center 0

so...

0.0278/2 =0.0139 this corresponds to 2.20 on the z-score chart