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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 one 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?

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

If an analysis of variance is used for the following data, what would be the effect of changing the value of M2 to 20?Sample DataM1 = 10    M2 = 15SS1 = 90    SS2 = 70

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

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 one 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?

The following table shows the results of an analysis of variance comparing three treatment conditions with a sample of n = 10 participants in each treatment.  Note that several values are missing in the table.  What is the missing value for SStotal?Source         SS       df      MS      Between     20      xx      xx      F = xxWithin          xx       xx        2Total              xx       xx       

A sample has M = 72 and s = 4.  In this sample, what is the X value corresponding to z = –2.00?

An independent-measures study comparing two treatment conditions produces a t statistic with df = 18.  If the two samples are the same size (n1 = n2), how many participants were in each of the samples?

In analysis of variance, what is a factor?

In a linear regression equation with the form y = bx + a, what does the “a” represent?