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1. T Test Jeopardy Name that Statistical Test Let’s do research! Fun with SPSS Right or Wrong? Hodgepodge 100 100 100 100 100 200 200 200 200 200 300 300 300 300 300 400 400 400 400 400 500 500 500 500 500 Final Jeopardy

2. ANSWER: In SPSS, this number represents the exact probability of obtaining the result you did merely by chance (AKA if the H0 is assumed to be true) QUESTION: What is the significance level or p-value reported under the column Sig.(2-tailed) in SPSS? FINAL JEOPARDY

3. ANSWER:An instructor tries a new method of teaching statistics using humor in one section and the old method in another. This is the type of research design she is using, and this is the type of t test she would do to evaluate her research question. QUESTION: What is a between-subjects design and an independent-samples t test? Name that Statistical Test100

4. ANSWER: A researcher wants to know if his sample’s political orietation (rated by Ps on a 9-point Likert scale from “very conservative” to “very liberal”) is significantly different from moderate (5 on the scale). QUESTION: What is a single-group design and a one-sample t test? Name that Statistical Test 200

5. ANSWER: A clinical psychologist compares her clients general level of functioning (assessed by the Global Assessment of Functioning [GAF] scale; Axis V of the DSM-IV-TR, 2000) before therapy and then again after 10 sessions. QUESTION: What is a repeated measures design and a paired-samples t test? Name that Statistical Test300

6. ANSWER: A cognitive psychologist compares memory for nonsense syllables for participants who are either instructed in the use of a mnemonic strategy or who are not given any strategy. He is only interested in if the mnemonic strategy improves memory. QUESTION: What is a between-subjects design and a one-tailed independent-samples t test? Name that Statistical Test400

7. ANSWER: A school psychologist matches students who are similar to one another on math ability and then assess performance of the two groups of students after one group participates in a special math program. QUESTION: What is a matched-samples research design and a paired-samples t test? Name that Statistical Test500

8. ANSWER: You find a significant result, but your not sure whether the difference is big enough to be important so you decide to calculate this. QUESTION: What is effect size or Cohen’s d? Let’s do research!100

9. ANSWER: A friend of your in methods calculate’s Cohen’s d and gets a result of d = 2.75. He is not sure what this means, so this is how you tell him to interpret it. QUESTION: What isHoly shit!! That’s a huge effect!!? Let’s do research!200

10. ANSWER: This is when calculating Cohen’s d is appropriate. QUESTION: What is when you are doing a paired-samples or independent-samples t test, and the difference is significant? Let’s do research!300

11. ANSWER: Oh no, Levene’s test is significant!! This is what it means, and this is what I should do now. QUESTION: What is conclude that the homogeneity of variance assumption for the independent-samples t test is violated and report t value and p value for the second row (“equal variances not assumed”)? Let’s do research!400

12. ANSWER: In APA style, you should always report all of these things. QUESTION: What are means, standard deviations, degrees of freedom, obtained t value, p value, and Cohen’s d when appropriate? Let’s do research!500

13. ANSWER: In SPSS, the probability that you would use to evaluate significance when α = .01, and you are performing a one-tailed test. QUESTION: What is .01 * 2 = .02? Fun with SPSS100

14. ANSWER: In a one-sample t test, the confidence interval for these data. QUESTION: What is CI: .77 ≤ µ ≤ 1.17? Fun with SPSS200

15. ANSWER: In an independent-samples t test, the row from which you report results when Levine’s test is not significant. QUESTION: What is “equal variances assumed”? Fun with SPSS300

16. ANSWER: In an independent-samples t test, the confidence interval for the SPSS output reported above. QUESTION: What is CI: .33 ≤ µ ≤ 3.98? Fun with SPSS400

17. ANSWER: The conclusion a researcher would draw from these data. QUESTION: What is retain H0 and conclude there is no significant difference between students who prefer morning and afternoon classes? Fun with SPSS500

18. ANSWER: The type of error that occurs when I fail to reject a false null hypothesis. QUESTION: What is Type II error? Right or Wrong?100

19. ANSWER: The type of error that occurs when I reject a true null hypothesis. QUESTION: Type I error? Right or Wrong?200

20. ANSWER: The more of this you have, the more likely it is that you will make a correct decision about the null hypothesis. QUESTION: What is power? Right or Wrong?300

21. ANSWER: As the probability of Type II error decreases, this simultaneously increases. QUESTION: What is power? Right or Wrong?400

22. ANSWER: When you increase α, the “good news” is that the probability of this kind of mistake goes down, but this comes at a price because the probability of this other kind of mistake simultaneously increases. QUESTION: What is Type II error and Type I error? Right or Wrong?500

23. ANSWER: The only circumstance under which using a one-tailed test is appropriate. QUESTION: What is when an outcome opposite to that you are predicting means exactly the same thing to you as finding there’s no difference? Hodgepodge100

24. ANSWER: In the independent-samples t test, the assumption that the variances in the two populations you are comparing are equal. QUESTION: What is the homogeneity of variance assumption? Hodgepodge200

25. ANSWER: Increasing sample size decreases this, which then increases this. QUESTION: What is the standard error of the estimate and power? Hodgepodge300

26. ANSWER: In an independent-samples t test, the null and alternative hypotheses when I’m predicting that anxiety patients who get therapy will have less anxiety than those that don’t. QUESTION: What isH0: µtherapy - µno therapy ≥ 0 and HA: µtherapy - µno therapy < 0? Hodgepodge400

27. ANSWER: In an independent-samples t test, this is the null hypothesis that Levine’s test evaluates. QUESTION: What is the null hypothesis that the variance in the two samples being compared are equal? Hodgepodge500