A Member of the State Legislature Has Expressed Concern About

question 115

Essay

A member of the state legislature has expressed concern about the differences in the mathematics test scores of high school freshmen across the state.She asks her research assistant to conduct a study to investigate what factors could account for the differences.The research assistant looks at a random sample of school districts across the state and uses the factors of percentage of mathematics teachers in each district with a degree in mathematics,the average age of mathematics teachers,and the average salary of mathematics teachers.

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Definitions:

Degrees Of Freedom

The number of values in a final calculation of a statistic that are free to vary.

Null Hypothesis

A statement or hypothesis in statistics that suggests no significant difference or effect; it is the hypothesis that researchers aim to test against.

Region Of Rejection

Values of a statistic that result in the decision to reject the null hypothesis.

Alpha

The significance level set for a statistical hypothesis test, representing the probability of rejecting a true null hypothesis.