What proportion of the population is between 20 and 26


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.)

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