A College Instructor Is Interested in Whether Assigning Mandatory Homework

question 12

Multiple Choice

A college instructor is interested in whether assigning mandatory homework affects students' grades.Since she is currently teaching two sections of the same class, the instructor assigns homework to one of the classes and just recommends homework problems to the second class.Then she determines the number of people in each class who will receive an A, B, C, D, or F on the final exam.What would be the appropriate statistical advice to give to the instructor?

• A) It is unnecessary for her to analyze her data because you know from experience that mandatory homework improves your own grades in college classes.
• B) Unfortunately, she will not be able to analyze the data because the dependent variable is not a scale variable.If, however, she were to use percentages or points on the final exam as the dependent variable, she would be able to analyze the data.
• C) It is unnecessary for her to analyze the data because you know from experience that mandatory homework does not improve your own grades in college classes.
• D) She would have more power to detect an effect of homework if she used the students' percentage grades (or point grades) and performed a parametric statistical test.

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Definitions:

Epididymis

A long, coiled tube situated behind the testis, where sperm mature and are stored.

Glans Penis

The sensitive bulbous structure at the distal end of the penis, encompassing the urethral meatus.

Prepuce

The fold of skin covering the glans of the penis in males and the clitoral glans in females; also known as foreskin.

Pelvic Cavity

The body cavity located in the lower abdomen, bordered by the pelvic bones, and contains reproductive organs, the bladder, and the rectum.