The heights of adult males are normally distributed with a mean of 75 inches and a standard deviation of 3.5 inches.

19.What symmetric interval about the mean will contain approximately 68% of the heights?

A.71.5 to 78.5

B.65.5 to 73.5

C.68 to 82

D. 64.5 to 85.5

20.What is the probability of randomly selecting 1 male whose average height is at least 61 tall?

21.Which height is at the 60th percentile (rounded to the nearest whole number)?

A. 76

B. 70

C. 72

D.68