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A researcher selects a sample of 100 people to investigate the relationship between gender (male/female) and registering to vote.  The sample consists of 40 females, of whom 30 are registered voters, and 60 males, of whom 40 are registered voters.  If these data were used for a chi-square test for independence, what is the expected frequency for registered females?

A researcher performs a regular two-tailed test using α = .05 and rejects the null hypothesis. If the researcher used a directional (one-tailed) test with the same data, then what decision would be made? Hint: Think about how the critical region changes.

An analysis of variance produces SSbetween = 30, SSwithin = 60, and an F-ratio with df = 2, 15.  For this analysis, what is the F-ratio?

A researcher selects a sample of 100 people to investigate the relationship between gender (male/female) and registering to vote.  The sample consists of 40 females, of whom 30 are registered voters, and 60 males, of whom 40 are registered voters.  If these data were used for a chi-square test for independence, what is the observed frequency for registered males?

Correlation __________ imply causation.

Which of the following confidence intervals also indicates a significant difference between treatments with alpha = .05?

Which of the following not used in an F-ratio for the two-factor analysis of variance?

For the independent-measures t statistic, what is the effect of increasing the sample variances?

Which of the following sets of correlations correctly shows the strongest to lowest degree of relationship?

A sample of n = 9 scores has a variance of s2 = 18.  If the scores were a population, what value would be obtained for the population variance?