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 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?

For an independent-measures t statistic, what is the effect of increasing the number of scores in the samples?

Which of the following is an accurate definition of a Type II error?

Two samples, each with n = 8, produce an independent-measures t statistic of t = –2.15.  Which of the following decisions is justified?

Which of the following describes what a confidence interval does?

On average, what value is expected for the F-ratio if the null hypothesis is true?

Two samples, each with n = 8, produce an independent-measures t statistic of t = –2.15.  Which of the following decisions is justified?

For an independent-measures t statistic, what is the effect of increasing the number of scores in the samples?