One sample has a variance of s2 = 10 and a second sample has a variance of s2 = 6.  If the two samples have the same number of scores, what is the pooled variance for the two samples?

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?

For a two-factor study with 2 levels of factor A, 2 levels of factor B, and a separate sample of 10 participants in each treatment condition, what is dfwithin treatments?

A researcher studies the number of dogs in an average household in Wisconsin. The number of dogs is an example of a(n) _________ variable.

In analysis of variance, what is a factor?

Which of the following is NOT an assumption made when calculating a factorial/two-factor ANOVA?

A set of N = 10 scores has a mean of µ = 50.  If 20 points are added to one of the scores, what is the new value for the population mean?

A repeated measures study uses a sample of 25 participants to evaluate the mean differences among 7 treatment conditions. In the analysis of variance for this study, what is the value for dfwithin groups?

Using letter grades (A, B, C, D, and F) to classify student performance on an exam is an example of measurement on a(n) ____ scale of measurement.