Zinc is a mineral that supports a healthy immune system. A doctor recommend zinc to four of her patients. The doctor recommended different amounts of zinc over a three month period. To which patient did the doctor recommend they increase the amount of zinc each month? A) Patient # 1 B) Patient # 2 C) Patient # 3 D) Patient # 4

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.