Beth Has Designed a Study to Examine Whether a New

question 56

Multiple Choice

Beth has designed a study to examine whether a new method of learning historical facts will improve the ability of sixth-grade students to recall such facts.The assumption that there will be no difference in the recall ability of a group of sixth graders who use the new method,and those who do not,is the

• A) alternative hypothesis.
• B) null hypothesis.
• C) inferential hypothesis.
• D) research hypothesis.

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Definitions:

Expected Value

A measure in probability and statistics indicating the average outcome of a random event, calculated as the weighted average of all possible values.

Null Hypothesis

A statement or idea that suggests there is no statistical significance or effect between certain observed phenomena or variables.

Wilcoxon Rank Sum Test

A nonparametric statistical test that compares two independent samples to assess whether their populations have the same distribution.

Height Centimeters

A measurement of how tall a person or object is, specified in centimeters.