Humpback whales are one of the larger species of whales that can be seen off the coast of California. Suppose that researchers measured the lengths, in feet, of 20 male humpback whales and 20 female humpback whales. Then, the researchers drew two box plots to summarize the data.

In a survey of 1015 adults, a polling agency asked, "when you retire, do you think you will have enough money to live comfortably or not. of the 1015 surveyed, 534 stated that they were worried about having enough money to live comfortably in retirement. construct a 90% confidence interval for the proportion of adults who are worried about having enough money to live comfortably in retirement.