A Statistics Instructor Wishes to Know the Average Age (In

question 40

Multiple Choice

A Statistics instructor wishes to know the average age (in month) of his 200 students.He decides to choose 25 students from the class and ask them for their age.All 200 names are put in a hat and 25 names are then chosen at random (without replacement) .The average age of the students chosen is observed to be 231 months.In this example,"25" is known as what?

• A)The sample
• B)A census
• C)The population
• D)The population size
• E)The sample size

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Definitions:

Hypothetical Proposition

A compound proposition that uses the connective “if . . . then.”

Disjunctive Proposition

A statement in logic that presents two or more alternatives, where the truth of at least one alternative makes the proposition true.

Contrapositive

A logical statement derived by negating and swapping the hypothesis and conclusion of the original conditional statement. If the original statement is "If P, then Q," the contrapositive is "If not Q, then not P."

Hypothetical Proposition

A proposition or statement that is based on a hypothesis or an assumption rather than on known facts.