A Student Wanted to Construct a 95% Confidence Interval for the Mean

question 40

Multiple Choice

A student wanted to construct a 95% confidence interval for the mean age of students in her statistics class. She randomly selected nine students. Their mean age was 19.1 years,with a sample standard deviation of 1.5 years. What is the 95% confidence interval for the population mean?

• A)[0.97,3.27]
• B)[15.64,22.56]
• C)[17.97,20.23]
• D)[17.95,20.25]

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