A researcher was interested in knowing if inspirational messages from professors would make a difference on students' performance on an exam. The researcher had all 8 of the participants take part in both treatment conditions: 1) on day 1 they received a blurb about the weather from their professor, and 2) on day 5 they received a positive email from their professor. After each condition, they took a statistics quiz. The researcher hypothesized that the mean exam scores for quiz 1 would be different than quiz 2. The alpha level was .01. What t-test should they conduct? What is the correct null Hypothesis? Is this directional or non directional?
A researcher was interested in knowing if inspirational messages from professors would make a difference on students' performance on an exam. The researcher had all 8 of the participants take part in both treatment conditions: 1) on day 1 they received a blurb about the weather from their professor, and 2) on day 5 they received a positive email from their professor. After each condition, they took a statistics quiz. The researcher hypothesized that the mean exam scores for quiz 1 would be different than quiz 2. The alpha level was .01.
What t-test should they conduct?
What is the correct null Hypothesis?
Is this directional or non directional?
The critical is?
The calculated t is?
Should we reject the null?
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