State contribute to a retirement plan

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Reference no: EM131820556

Suppose that 40% of all U.S. employees contribute to a retirement plan (p = .40).

a. In a random sample of 100 employees, what is the approximate probability that at least half of those in the sample contribute to a retirement plan?

b. Suppose you were told that at least 60 of the 100 employees in a sample from your state contribute to a retirement plan. Would you think p = .40 for your state? Explain.

Reference no: EM131820556

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