Vitamins for Women A medical researcher wishes to
Chapter 7, Problem 15(choose chapter or problem)
Vitamins for Women A medical researcher wishes to determine the percentage of females who take vitamins. He wishes to be 99% confident that the estimate is within 2 percentage points of the true proportion. A recent study of 180 females showed that 25% took vitamins. a. How large should the sample size be? b. If no estimate of the sample proportion is available, how large should the sample be?
Unfortunately, we don't have that question answered yet. But you can get it answered in just 5 hours by Logging in or Becoming a subscriber.
Becoming a subscriber
Or look for another answer