A Statistics Professor Wishes to Estimate the Average Mark on a Term

question 50

Multiple Choice

A statistics professor wishes to estimate the average mark on a term test for a course that has multiple sections and many students. A survey of some of the students registered for the course reveals the following results: The student from the course wonders whether the population mean could have been 75 or 80.

• A) Since 80 is within the 95% confidence interval, the population mean is likely to be 80.
• B) Since 80 is not within the 95% confidence interval, the population mean is not likely to be 80.
• C) Since 75 is within the 95% confidence interval, the population mean is likely to be 75.
• D) Since neither 75 nor 80 is within the 95% confidence interval, the population mean is not likely to be 75 or 80.
• E) Since 80 is not within the 95% confidence interval, the population mean is not likely to be 80, but it is likely to be 75.

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