A Professor Compared Differences in Class Grades Between Students in Their

question 8

Multiple Choice

A professor compared differences in class grades between students in their freshman,sophomore,junior,and senior years of college.If different participants were in each group,then what type of statistical design is appropriate for this study?

• A)a two-independent sample t test
• B)a one-way between-subjects ANOVA
• C)a two-way between-subjects ANOVA
• D)both A and B

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Definitions:

Null Hypothesis

A default hypothesis that there is no significant difference or effect, used as a starting point for statistical testing.

Type I Error

A Type I error occurs when a true null hypothesis is incorrectly rejected.

Rejecting

The act of not accepting or dismissing a statistical hypothesis based on the analysis of data.

Level of Significance

The threshold probability used in hypothesis testing to determine whether to reject the null hypothesis.