Simple random sampling is not the most statistically efficient method, because a. it takes too long b. it doesn’t sample enough people c. it may not get a good representation of subgroups in a population d. there is no easy way to collect the data select the best answer from the choices provided

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.