A researcher is performing a directional (one-tailed) one-sample t-test with a sample of n = 25 to evaluate the effect of a treatment that is predicted to decrease scores. If the researcher obtains t = –1.700, then what decision should be made?

Given t(4) = 2.0, what is r²?

A population of N = 6 scores has ΣX = 30.  What is the population mean?

An independent-measures study has one sample with n = 10 and a second sample with n = 15 to compare two experimental treatments.  What is the df value for the t statistic for this study?

The values in the following matrix are treatment means from a two-factor study. One of the means is missing. What value for the missing mean would most likely result in main effect for factor A but not factor B?     B1 B2 A1 8 12 A2 6 ?

What is the value of SS (sum of squared deviations) for the following sample?Sample:  1, 1, 1, 3

A set of n = 15 pairs of X and Y scores has SSX = 10, SSY = 40, and SP = 30.  What is the slope for the regression equation for predicting Y from X?

In a frequency distribution graph, frequencies are presented on the ____ and the scores (categories) are listed on the ____.

A repeated-measures analysis of variance for a study comparing three treatment conditions with a sample of 10 participants, produces an F-ratio of F = 5.40.  For this result, which of the following is the correct statistical decision?

For a repeated-measures study comparing three treatment conditions with a sample of 4 participants, the participant totals (the P values) are 3, 6, 9, and 6.  What is the value for SSbetween subjects?