An Instructor in Introductory Psychology Wanted to Know If the Textbook

question 17

Multiple Choice

An instructor in Introductory Psychology wanted to know if the textbook she was using was as effective as other textbooks on the market. In order to test this, she decided that she would teach the course in the fall with the text she typically uses, and in the spring she would use a new text. After doing this, she compared the students' final grades and students' responses to an 'end of semester' evaluation question. The question was "How effective was the text for this course?" She discovered that students' grades increased from a mean of 78 in the fall to 83 in the spring. She also discovered that the students' opinion of the course's text increased from a mean of 4.5 (on a 7-point scale, the higher the better) in the fall to 4.9 in the spring. After running the appropriate statistical test(s) , she discovered that both of these differences were statistically significant.
How can we tell if the difference in the student opinion in the two semesters was a meaningful difference?

• A) rely on a statistical test of significance
• B) calculate an r -family measure of statistical significance
• C) report a standardized mean difference
• D) report a simple mean difference

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Definitions:

Dividend Paid

The amount distributed by a corporation to its shareholders from its earnings based on the number of shares each shareholder owns.

Par Value

The face value of a bond or stock as stated by the issuing company, not necessarily its market value.

Dividend Paid

Dividend Paid refers to the amount of earnings distributed by a corporation to its shareholders as a reward for their investment.

Preferred Stock

A type of stock issued by corporations, which gives holders a right to share in earnings and liquidation before common shareholders do.