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A two-factor research study has two levels of factor A and three levels of factor B with 8 participants in each treatment condition.  For this study, what is the value for dfbetween treatments?

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.

What is the critical value for a regression analysis with n=20, 1 predictor variable, and an alpha level of 0.01?

For a research study, comparing attitude scores for males and females, participant gender is an example of what kind of variable?

Which is the strongest correlation?

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.

A population of scores has µ = 80.  In this population, a score of X = 86 corresponds to z = +2.00.  What is the population standard deviation?

A researcher is conducting an experiment to evaluate a treatment that is expected to increase the scores for individuals in a population.  If the researcher uses a one-tailed test with alpha = .01, then which of the following correctly identifies the critical region?

What is the critical value for a correlation with n=25, two-tailed, and an alpha level of 0.05?

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?