Construct a 90% Confidence Interval for the Population Mean $\mu _ { . }$

question 48

Multiple Choice

Construct a 90% confidence interval for the population mean, $\mu _ { . }$ Assume the population has a normal distribution. In a recent study of 22 eighth graders, the mean number of hours per week that they watched
Television was 19.6 with a standard deviation of 5.8 hours.

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

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