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A nursing home conducted a study on their residents. They reported that the residents that participated in daily group activities had better moods than those residents that did not participate. What is the IV and DV of their study?

One sample of n = 8 scores has a variance of s2 = 6 and a second sample of n = 8 scores has s2 = 10.  If the pooled variance is computed for these two samples, then the value obtained ____.

Which of the following is the correct null hypothesis for a repeated-measures t test?

Fill in the blanks: the independent variable is ______ and the dependent variable is ______.

If all other factors were held constant, how does a large variance affect the t-statistic?

Figure 2.1For the distribution in the accompanying graph, what is the value of ΣX?

A sample with a mean of M = 40 and a variance of s2 = 20 has an estimated standard error of 2 points. How many scores are in the sample?

What are the values for SS and variance for the following sample of n = 3 scores?  Sample:  1, 4, 7  Mean = 4

A researcher is measuring the amount of time needed to solve a set of anagrams for a sample of n = 15 students.  However, one of the participants fails to solve the problems so the researcher has an undetermined score.  What is the best measure of central tendency for these data?

There are 2 groups with n=20 in each sample. Group 1 has an average of M=56 with SS=703 and group 2 has an average of M=71 with SS=627. What is the pooled variance?