Construct a 90% Confidence Interval for the Population Mean, μ

question 43

Multiple Choice

Construct a 90% confidence interval for the population mean, μ. Assume the population has a normaldistribution. In a recent study of 22 eighth graders, the mean number of hours per week that they played videogames was 19.6 with a standard deviation of 5.8 hours. Round to the nearest hundredth.

• A) (17.47, 21.73)
• B) (18.63, 20.89)
• C) (5.87, 7.98)
• D) (19.62, 23.12)

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