A researcher is interested in attitudes toward same-sex couples after hearing a persuasive talk about equal rights. Data was collected from 60 participants. Each person completed a survey that measured attitudes toward same-sex couples on a scale of -7 (very negative) to +7 (very positive) before and after the persuasive speech. What test is most appropriate to use to analyze this data?

A sample of n = 4 scores is selected from a population with an unknown mean.  The sample has a mean of M = 40 and a variance of s2 = 16.  Which of the following is the correct 90% confidence interval for µ?

An independent-measures research study uses two samples, each with n = 12, to compare two treatments. If the results are evaluated with a t statistic using a two-tailed test with α = .05, then what are the boundaries for the critical region?

An analysis of variance produces SStotal = 80 and SSwithin = 30.  For this analysis, what is SSbetween?

A population has µ = 50 and s = 5.  If 10 points are added to every score in the population, then what are the new values for the mean and standard deviation?

If a repeated-measures study shows a significant difference between two treatments with alpha = .01, then you can be sure that ____.

The following data were obtained from a repeated-measures research study. What is the value of MD for these data?Subject            1st       2nd   #1                  7          16   #2                  6          13   #3                10            8   #4                  9          18   #5                  7          14

If a t statistic is computed for a sample of n = 4 scores with SS = 300, then what are the sample variance and the estimated standard error for the sample mean?

A researcher conducts an experiment comparing two treatment conditions with 20 scores in each treatment condition. If a matched-subjects design is used, how many subjects are needed for the experiment?

For the repeated-measures t statistic, df = ____.