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What is the critical value for a correlation with n=22, two-tailed, and an alpha level of 0.10?

For a related samples t-test, the null hypothesis states _____.

You have a score of X = 65 on an exam.  Which set of parameters would give you the best grade on the exam?

A chi-square test for independence has df = 2.  What is the total number of categories (cells in the matrix) that were used to classify individuals in the sample?

A sample of 30 people is selected from a population with an unknown mean. The one-sample t estimation equation is used to compute the 99% confidence interval around µ. Which of the values below should be used for t in this equation?  µ = 40 ± ( t )( 4 )

Two separate samples are being used to estimate the population mean difference between two treatment conditions.  Which of the following would produce the widest confidence interval?

Which of the following is an example of a situation for which an independent-measures t-test would be the most appropriate?

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?

In a population with s = 8, a score of X = 44 corresponds to a z-score of z = –0.50.  What is the population mean?

A hypothesis test produces a one sample t-test statistic of t = 2.20.  If the researcher is using a two-tailed test with alpha = .05, how large does the sample have to be in order to reject the null hypothesis?