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

question 8

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) B & C are true

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Definitions:

Setbacks

Events or conditions that hinder progress or cause a decline in performance, often temporarily.

Personal Flaws

Individual weaknesses or shortcomings that are often character-based and can impact one's decisions or actions negatively.

Bipolar Disorders

Bipolar disorders are a group of mental health conditions signified by extreme mood swings that include emotional highs (mania or hypomania) and lows (depression).

Population

The total number of individuals or entities within a specified area or belonging to a particular group.