Statistical Methods for Psychology

randomization test where we draw every possible permutation once and only once), you would obtain the same result that Wilcoxon’ ...

direction; (2) Those that are in the opposite direction will be small ones. We will relax that second expectation when we shortl ...

In Appendix Twe find that for a one-tailed test at a 5.025 (or a two-tailed test at a5.05) with n 5 8, the entries are 3 (0.0195 ...

ranks) without affecting the final outcome. If the scores are of opposite signs, we normally assign tied ranks and proceed as us ...

18.8 The Sign Test The Wilcoxon matched-pairs signed-ranks test is an excellent distribution-free test for differences with matc ...

Since the binomial distribution is symmetric for p 5 .50, we would then double this proba- bility to obtain the two-tailed proba ...

where His then evaluated against the distribution k 21 df. As an example, assume that the data in Table 18.8 represent the numbe ...

was a well-known economist. This test is closely related to a standard repeated-measures analysis of variance applied to ranks i ...

If the null hypothesis is true, we would expect the rankings to be randomly distributed within each lecturer. Thus, one lecturer ...

a. Analyze these data using the two-tailed rank-sum test. b. What can you conclude? c. How would you go about analyzing these da ...

a. Analyze the data using Wilcoxon’s matched-pairs signed-ranks test. b. What can you conclude? 18.9 Rerun the analysis in Exerc ...

18.20 The test referred to in Exercise 18.19 is available on my Web site. Run that program on the data for Exercise 18.18 and re ...

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Appendices Appendix: Data Set Data for Exercises Appendix: Computer Data Sets Used in Computer Exercises Data Sets Appendix x^2 ...

692 Appendices Appendix: Data Set Howell and Huessy (1985) reported on a study of 386 children who had, and had not, exhib- ited ...

Appendix: Computer Data Sets 693 Variable Name Columns Description ID 1–3 Subject identification number ADDSC 5–6 ADD score aver ...

694 Appendices Variable Description Columns Legal Values FamNum Family ID number 1–3 100–400 GSI Variables Patient Variables Sex ...

Appendix: Computer Data Sets 695 recall interval have been deleted from the 1.0 mg/kg condition. A second data set was cre- ated ...

696 Appendices Variable Name Columns Description HostT 35–36 Hostility Tscore PhobT 38–39 Phobic anxiety Tscore ParT 41–42 Paran ...

Appendix x^2 : Upper Percentage Points of the x^2 Distribution 697 Appendix x^2 : Upper Percentage Points of the x^2 Distributio ...