Determine the area under the standard normal curve that lies

Determine the area under the standard normal curve that lies between (a) Upper Z equals negative 2.17 and Upper Z equals 2.17, (b) Upper Z equals negative 2.58 and Upper Z equals 0, and (c) Upper Z equals negative 1.54 and Upper Z equals negative 0.39.

Solution

Here z= -2.17 and z= 2.17

so based on the formula for area, the standard normal curve`s area = 0.969993