A normal population has a mean of 20.0 and a standard deviation of 4.0.

a. Compute the z value associated with 25.0.

b. What proportion of the population is between 20.0 and 25.0?

c. What proportion of the population is less than 18.0?

A normal population has a mean of 20.0 and a standard deviation of 4.0.

a. Compute the z value associated with 25.0.

b. What proportion of the population is between 20.0 and 25.0?

c. What proportion of the population is less than 18.0?