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Suppose a poll of 20 voters is taken in a large city The purpose is to determine x the number who favor a certain candidate for mayor Suppose that 60% of all the city’s voters favor the candidate

Suppose a poll of 20 voters is taken in a large city. The purpose is to determine x, the number who favor a certain candidate for mayor. Suppose that 60% of all the city’s voters favor the candidate.

a. Find the mean and standard deviation of x.

b. Use Table II of Appendix A to find the probability that x ≤ 10.

c. Use Table II to find the probability that x > 12.

d. Use Table II to find the probability that x = 11.

e. Graph the probability distribution of x, and locate the interval μ ± 2σ on the graph.

Aug 07 2020 Read more Less More

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