38. Fifty-one percent of workers are confident that they will retire with a comf

Question

38. Fifty-one percent of workers are confident that they will retire with a comfortable lifestyle. You randomly select 10 workers, find the probability that the number of workers who are confident that they will retire with a comfortable lifestyle is (a) exactly two, (b) more than two, and (c) between two and five, inclusive. Round to the nearest thousandth. Binomial coefficients must be typed in via "insert equation" 39. Thirty-four percent of voters think that Congress should help write standards for school food. You randomly select five voters and ask them whether they support this opinion. Let random variable be the number of yes, construct the probability distribution of and find by using both the definition and the formulas

Explanation / Answer

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38) p = 0.51

a) P(X = 2)

P = 10C2 * 0.51^2 * 0.49^8

P = 0.039

b) P(X > 2) = 1 - P(X = 0) - P(X = 1) - P(X = 2)

P = 0.952

c) Between 2 and 5

P = 0.598 - 0.009

P = 0.589

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