Blog

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?

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

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?

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 no main effect for factor A?     B1 B2 A1 11 13 A2 15 ?

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