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

question 18

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 60 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 60 is within the 95% confidence interval, the population mean is likely to be 60.
• D) Since neither 60 nor 80 is within the 95% confidence interval, the population mean is not likely to be 60 or 80.

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Definitions:

Statute of Frauds

A legal concept requiring certain types of agreements to be executed in writing and signed by the parties involved to be enforceable.

Collateral Promises

Agreements that are secondary to a primary transaction or promise, often requiring the backup of an asset as security.

One-Year Rule

A legal provision in contract law stating that contracts which cannot be performed within one year must be in writing to be enforceable.

Oral Contract

An agreement between parties that is spoken, not written, but is still legally binding.