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A student investigated how washing with soap affects bacteria levels on the hands. She tested three different methods—washing with water only, washing with regular soap, and washing with antibacterial soap. She randomly assigned 99 students to 1 of the 3 treatments. Participants washed their hands with the assigned method and cultures were taken and incubated. Based on the SPSS output below, was there a significant difference among the three hand-washing methods and why?

A two-factor study with two levels of factor A and three levels of factor B uses a separate group of 5 participants in each treatment condition.  How many participants are needed for the entire study?

The less hours a student spends studying, the worse their score is on an exam. What is this an example of?

If other factors are held constant, which of the following sets of data would produce the largest value for an independent-measures t statistic?

In analysis of variance (ANOVA), the F-ratio is the _____________?

Dr Gallimore notices that students that complete examinations early appear to receive worse grades than students that hang on to examinations until the last possible moment. The relationship between test score and exam time is an example of  _______________ .

What is the value of Σ(X + 1) for the following scores?  Scores: 2, 4, 7

What is the pooled variance for the following two samples?Sample 1:  n = 8 and SS = 168Sample 2:  n = 6 and SS = 120

A researcher reports an F-ratio with df = 2, 18 from an independent-measures research study.  Based on the df values, how many treatments were compared in the study and what was the total number of subjects participating in the study?

What is the critical value for a repeated measures ANOVA with N=46, 5 levels for factor A, dfWG = 86, and an alpha level of 0.01?