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 is indicated by a large variance for a sample of difference scores?

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

What is the value of SS for the following set of scores?  Scores:  8, 3, 1

Which of the following best describes the Pearson correlation for these data?X   Y2   5  5   13   44   2

A set of n = 50 pairs of scores (X and Yvalues) produces a regression equation of Ŷ = 5X + 21. Find the predicted Y value for an X score of -4.

What is the critical value for a regression analysis with n=77, 1 predictor variable, and an alpha level of 0.05?

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 kind of frequency distribution graph shows the frequencies as bars that are separated by spaces?