Becky Liddle at Auburn University published a study in 1997 on disclosing sexual orientation in class. She taught four sections of the same class, and at the week of the final lecture she disclosed her lesbian identity to two of the sections, and withheld it from the two others. She was concerned with the issue of whether disclosure would influence student evaluations of the course. The means and average variance for the two conditions, further broken down by gender of the students, are presented below. There were 15 students in each cell. Perform a two-way analysis of variance and draw the appropriate conclusions. (The means are the same that Liddle found, but because I could not control for difference in mid-term evaluations, as she did, the effect of gender is different from the effect she found. The other effects lead to similar conclusions.)
Average within-cell variance = 20.74
Answer to relevant QuestionsUse LazStats or MYSTAT to reproduce the results in Exercise 17.13. Referring to Exercise 17.8, it seems obvious that the sample sizes do not reflect the relative frequency of these characteristics in the population. Would you expect the mean for all these primiparous mothers to be a good ...Use MYSTAT or LazStats to replicate the results in Table 18.1. (The MYSTAT output will be more limited than what you have seen. Specify all five as dependent variables before clicking on “Repeated Measures.”) Use the data in Exercise 19.8 to demonstrate how chi-square varies as a function of sample size. (a) Double each cell entry and recompute chi-square. (b) What does this have to say about the role of the sample size in ...Let’s see how students and faculty compare on a basic statistical question. Zuckerman, Hodgins, Zuckerman, and Rosenthal (1993) surveyed 550 people and asked a number of questions on statistical issues. In one question a ...
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