A Student Wanted to Quickly Construct a 95% Confidence Interval

question 47

Multiple Choice

A student wanted to quickly construct a 95% confidence interval for the average age of students in
Her statistics class. She randomly selected 9 students. Their average age was 19.1 years with a
Standard deviation of 1.5 years. What is the best point estimate for the population mean?

• A) 2.1 years
• B) 1.5 years
• C) 19.1 years
• D) 9 years
• E) 17.6 years