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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  _______________ .

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 ANOVA has 6 levels for Factor A and 4 levels for Factor B. Each sample has n=7 participants. How many participants are needed in all for this study?

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 one way to see if there is an interaction for 2×2 ANOVA?

The values in the following matrix are treatment means from a two-factor study. One of the means is missing. What value for the missing mean would most likely result in no main effect for factor A, factor B, and no interaction?     B1 B2 A1 13 16 A2 16 ?

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?

A distribution with µ = 55 and σ = 6 is being standardized so that the new mean and standard deviation will be µ = 50 and σ = 10.  When the distribution is standardized, what value will be obtained for a score of X = 58 from the original distribution?

An independent-measures research study uses two samples, each with n = 12 participants.  If the data produce a t statistic of t = 2.50, then which of the following is the correct decision for a two-tailed hypothesis test?