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A utility company serves 50,000 households. As part of a survey of customer attitudes, they take a simple random sample of 750 of these households. The average number of television sets in the sample households turns out to be 1.86, and the SD is 0.86. Find a 95% confidence interval for the average number of television sets per household.

a. 1 to 2.72

b. not possible

c. 1.83 to 1.89

d. 1.80 to 1.92

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Statistics and Probability, Statistics

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