Mathematics, 24.06.2021 20:50 hurricane01
It has been estimated that 17.0 % of mutual fund shareholders are retired persons. Assuming a simple random sample of 400 shareholders has been selected: a. What is the probability that at least 20 % of those in the sample will be retired? b. What is the probability that between 15 % and 21 % of those in the sample will be retired?
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