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 ____.

A chi-square test for independence has df = 3.  What is the total number of categories (cells in the matrix) that were used to classify individuals in the sample?

What frequency distribution graph is appropriate for scores measured on a nominal scale?

For the following frequency distribution of exam scores, how many students had scores lower than X = 80?X               f 90-94    385-89    480-84    575-79    270-74    1

A set of n = 30 pairs of scores (X and Yvalues) produces a regression equation of Ŷ = 11X + 13. Find the predicted Y value for an X score of 10.

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?

What is the mean for the population of scores shown in the frequency distribution table?X    f5    14    23    32    41    2

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?