According to a past survey, approximately half U.S. workers said that they have enough money
to live comfortably now and expected to do so in the future. If you select a random sample of 200
U.S. workers,
a. What is the probability that the sample will have between 45% and 55% who say they have
enough money to live comfortably now and expect to do so in the future?
b. The probability is 90% that the sample percentage will be contained within the symmetrical limits
of the population percentage?