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One sample with n = 4 scores has a mean of M = 12, and a second sample with n = 6 scores has a mean of M = 8.  If the two samples are combined, what is the mean for the combined set of scores?

Two samples, each with n = 9 scores, produce an independent-measures t statistic of  t = 2.00.  If the effect size is measured using r2, what is the value of  r2?

For a particular sample, the largest distance (deviation) between a score and the mean is 11 points.  The smallest distance between a score and the mean is 4 points.  Therefore, the standard deviation ____.

What is the value of SS (sum of squared deviations) for the following population?Population:  2, 3, 0, 5

A researcher selects a sample of n = 17 individuals from a population with a mean of μ = 75 and administers a treatment to the sample. If the research predicts that the treatment will increase scores, then what is the correct statement of the null hypothesis for a directional (one-tailed) test?

For a population with  µ = 80 and ó = 20, the distribution of sample means based on n = 16 will have an expected value of ____ and a standard error of ____.

What is stated by the alternative hypothesis (H1) for an ANOVA?

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

For a particular sample, the largest distance (deviation) between a score and the mean is 11 points.  The smallest distance between a score and the mean is 4 points.  Therefore, the standard deviation ____.

Which statement is true about the t-distribution?