Professors who teach introductory psychology courses often hear students say that psychology is just "common sense." To test this assumption, Professor Empiricism administers a Fact or Fiction Survey at the beginning of the semester and then again at the end of the semester. She believes that after students are exposed to research-based evidence, students will score higher on the end-of-semester survey. Pre- and post-scores for a sample of her students are listed below:
a. Test the professor's hypothesis using a one-tailed, repeated measures t test with α = .05.
b. Calculate Cohen's d effect size and interpret the result.

Question

Professors who teach introductory psychology courses often hear students say that psychology is just "common sense." To test this assumption, Professor Empiricism administers a Fact or Fiction Survey at the beginning of the semester and then again at the end of the semester. She believes that after students are exposed to research-based evidence, students will score higher on the end-of-semester survey. Pre- and post-scores for a sample of her students are listed below:
  a. Test the professor's hypothesis using a one-tailed, repeated measures t test with α = .05.
b. Calculate Cohen's d effect size and interpret the result.

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The Answer of Professors who teach introductory psychology courses often hear students say that psychology is just "common sense." To test this assumption, Professor Empiricism administers a Fact or Fiction Survey at the beginning of the semester and then again at the end of the semester. She believes that after students are exposed to research-based evidence, students will score higher on the end-of-semester survey. Pre- and post-scores for a sample of her students are listed below:
  a. Test the professor's hypothesis using a one-tailed, repeated measures t test with α = .05.
b. Calculate Cohen's d effect size and interpret the result.

Professors Who Teach Introductory Psychology Courses Often Hear Students Say