The heights of adult men in America are normally distributed, with a mean of 69.8 inches and a standard deviation of 2.62 inches. The heights of adult women in America are also normally distributed, but with a mean of 64.6 inches and a standard deviation of 2.56 inches.

a. If a man is 6 feet 3 inches tall, what is his z-score (to 4 decimal places)?

z =

b. If a woman is 5 feet 11 inches tall, what is her z-score (to 4 decimal places)?

z =