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 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?

What term is used to identify the mean of the distribution of sample means?

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?

What is the value of Σ(X – 2) for the following scores?  Scores: 2, 3, 5

For a sample with s = 12, a score of X = 73 corresponds to z = 1.00.  What is the sample mean?

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       

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