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

3. Question Answer FINAL JEOPARDY ANSWER: In SPSS, this number represents the exact probability of obtaining the result you did merely by chance (AKA if the H 0 is assumed to be true) QUESTION: What is the significance level or p-value reported under the column Sig.(2-tailed) in SPSS?

4. Question Answer Name that Statistical Test 100 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?

5. Question Answer Name that Statistical Test 200 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?

6. Question Answer Name that Statistical Test 300 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?

7. Question Answer Name that Statistical Test 400 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?

8. Question Answer Name that Statistical Test 500 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?

9. Question Answer 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

10. Question Answer Let’s do research! 200 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 is Holy shit!! That’s a huge effect!!?

11. Question Answer Let’s do research! 300 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?

12. Question Answer Let’s do research! 400 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”)?

13. Question Answer Let’s do research! 500 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?

14. Question Answer Fun with SPSS 100 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?

15. Question Answer Fun with SPSS 200 ANSWER: In a one-sample t test, the confidence interval for these data. QUESTION: What is CI:.77 ≤ µ ≤ 1.17?

16. Question Answer Fun with SPSS 300 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”?

17. Question Answer Fun with SPSS 400 ANSWER: In an independent-samples t test, the confidence interval for the SPSS output reported above. QUESTION: What is CI:.33 ≤ µ ≤ 3.98?

18. Question Answer Fun with SPSS 500 ANSWER: The conclusion a researcher would draw from these data. QUESTION: What is retain H 0 and conclude there is no significant difference between students who prefer morning and afternoon classes?

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

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

21. Question Answer Right or Wrong? 300 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?

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

23. Question Answer Right or Wrong? 500 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?

24. Question Answer Hodgepodge 100 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?

25. Question Answer Hodgepodge 200 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?

26. Question Answer Hodgepodge 300 ANSWER: Increasing sample size decreases this, which then increases this. QUESTION: What is the standard error of the estimate and power?

27. Question Answer Hodgepodge 400 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 is H 0 : µ therapy - µ no therapy ≥ 0 and H A : µ therapy - µ no therapy < 0?

28. Question Answer Hodgepodge 500 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?