3.17 Indicate whether each of the following distributions is positively or negatively skewed. The distribution of

(a) incomes of taxpayers has a mean of $48,000 and a median of $43,000.

(b) GPAs for all students at some college has a mean of 3.01 and a median of 3.20.

(c) number of "romantic affairs" reported anonymously by young adults has a mean of 2.6 affairs and a median of 1.9 affairs.

(d) daily TV viewing times for preschool children has a mean of 55 minutes and a median of 73 minutes.