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?

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

What technique uses an independent variable to explain the variability of the dependent variable?

What is the final step to be performed when computing Σ(X – 2)2?

What additional information is obtained by measuring two individuals on an interval scale compared to a ordinal scale?

A researcher uses a repeated-measures design to compare individuals’ performance before treatment with their performance after treatment.  If all of the participants show improved performance of 8 or 9 points after treatment, then the researcher should find ____.

For a population with µ = 40 and s = 8, what is the X value corresponding to z = 1.50?

If other factors are held constant, what is the effect of increasing the sample size?

The results of a two-factor analysis of variance produce df = 2, 36 for the F-ratio for factor A and df = 2, 36 for the F-ratio for factor B.  What are the df values for the AxB interaction?

One sample has n = 10 scores and a variance of s2 = 20, and a second sample has n = 15 scores and a variance of s2 = 30.  What can you conclude about the pooled variance for these two samples?