The Principal of a Middle School Claims That Test Scores $\sigma = 14.7$

question 115

Multiple Choice

The principal of a middle school claims that test scores of the seventh-graders at his school vary less than the test scores of the seventh-graders at a neighboring school, which have variation described by $\sigma = 14.7$ .
Assuming that a hypothesis test of the claim has been conducted and that the conclusion is to reject the null hypothesis, state the conclusion in nontechnical terms.

• A) There is not sufficient evidence to support the claim that the standard deviation is less than 14.7.
• B) There is sufficient evidence to support the claim that the standard deviation is less than 14.7.
• C) There is sufficient evidence to support the claim that the standard deviation is greater than \(14.7\).
• D) There is not sufficient evidence to support the claim that the standard deviation is greater than \(14.7\).

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Definitions:

Unionization Rate

The percentage of the workforce that is a member of a union, indicating the level of union presence within the labor market.

Major Strikes

Significant work stoppages initiated by employees to protest against employment conditions, policies, or decisions.

Collective Bargaining

Collective bargaining is the negotiation process between employers and a group of employees aimed at reaching agreements that regulate working conditions.

Right-to-Work Laws

Legislation that prohibits agreements between labor unions and employers that make membership or payment of union dues a condition of employment.