SOLUTION: The birth control shot is one of the most effective methods of birth control available, and it works best when you get the shot regularly, every 12 weeks. Under ideal conditions, o

Question 1054109: The birth control shot is one of the most effective methods of birth control available, and it works best when you get the shot regularly, every 12 weeks. Under ideal conditions, only 1% of women getting the shot become pregnant within one year. In typical use, however, 3% become pregnant.
A study of the effectiveness of the birth control shot interviews a random sample of 650 women who are using the shot as their method of birth control.
A) What is the approximate probability that at least 20 of these women become pregnant in the next year? (Round your answer to four decimal places.)
Answer by ewatrrr(24785) (Show Source): You can put this solution on YOUR website!
sample proportion = p-hat = 20/650 = 0.030769 0r 3.0769 % (Rounded to four decimal places.)
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