A normal population has a mean of 20 and a standard deviation of 3.
a. Compute the z value associated with 26. (Round your answer to 2 decimal places.)
Z
b. What proportion of the population is between 20 and 26? (Round z-score computation to 2 decimal places and your final answer to 4 decimal places.)
Proportion
c. What proportion of the population is less than 15? (Round z-score computation to 2 decimal places and your final answer to 4 decimal places.)