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.

What is the value of the estimated standard error for the following set of D-scores?Scores:  2, 2, 10, 2

For an analysis of variance comparing four treatments, MSbetween = 12.  What is the value of SSbetween?

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?

What is the value of ΣX + 1 for the following scores?  Scores 1, 0, 2, 4

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

A jar contains 10 red marbles and 30 blue marbles.  A random sample of n = 3 marbles is selected from the jar.  If the first two marbles are both blue, what is the probability that the third marble will be red?

A set of n = 5 pairs of X and Y scores has ΣX = 15, ΣY = 5, and ΣXY = 10.  For these data, the value of SP is ____.

In an experimental study:

A sample of n = 4 scores has SS = 60.  What is the variance for this sample?