American workers are increasingly planning to delay retirement US News
American workers are increasingly planning to delay retirement (US News & World Report, June 30, 2010). According to a Pew Research Center comprehensive survey, 35% of employed adults of age 62 and older say they have pushed back their retirement date.
a. What is the probability that in a sample of 100 employed adults of age 62 and older, more than 40% have pushed back their retirement date?
b. What is the probability that in a sample of 200 employed adults of age 62 and older, more than 40% have pushed back their retirement date?
c. Comment on the difference between the two estimated probabilities.

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