The figure on the next page (adapted from the San Francisco Chronicle, May 18, 1992) shows the distribution of American families by income. Ranges include the left endpoint but not the right. For example, 3.7% of the families had in-

comes in the range $0-$4,999, 5.8% had incomes in the range $5,000-$9,999, and so forth. True or false, and explain:

(a) Although American families are not spread evenly over the whole in-

come range, the families that earn between $10,000 and $35,000 are spread fairly evenly over that range.

(b) The families that earn between $35,000 and $75,000 are spread fairly evenly over that range.

(c) The graph is a histogram.