Assume heights of adult males have a mean of 69 inches. Tell whether each of the following distributions would be centered to the left of 69, at 69, or to the right of 69.
a. Sample mean height for samples of 16 college basketball players
b. Sample mean height for random samples of 6 adult males
c. Sample mean height for random samples of 16 adult males
d. Sample mean height for random samples of 16 students from a school that includes grades 7 through 12