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What technique uses an independent variable to explain the variability of the dependent variable?

The results of a two-factor analysis of variance produce df = 2, 36 for the F-ratio for factor A and df = 2, 36 for the F-ratio for factor B.  What are the df values for the AxB interaction?

If it is impossible to divide the existing categories of a variable, then it is an example of a(n) ____ variable.

An analysis of variance comparing three treatment conditions produces dfwithin = 21.  If the samples are all the same size, how many individuals are in each sample?

A researcher uses a repeated-measures design to compare individuals’ performance before treatment with their performance after treatment.  If all of the participants show improved performance of 8 or 9 points after treatment, then the researcher should find ____.

For a population with µ = 40 and s = 8, what is the X value corresponding to z = 1.50?

If other factors are held constant, what is the effect of increasing the sample size?

With alpha = .01 the two-tailed critical region for a t test using a sample of n = 16 subjects would have boundaries of ____.

If given a population mean but not the population’s standard deviation, which test is appropriate?

Kendall got an 80 on her Psychology exam. The mean was 85 and the standard deviation was 2. Tyler got a 75 on his Economics exam. The mean was 80 and the standard deviation was 5. Statistically who did better when the scores are z-scored?