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The average verbal SAT score for the entire class of entering freshmen is 530.  However, if you select a sample of 20 freshmen and compute their average verbal SAT score you probably will not get exactly 530.  What statistical concept is used to explain the natural difference that exists between a sample mean and the corresponding population mean?

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

In a two-factor ANOVA, which of the following is not computed directly but rather is found by subtraction?

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

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

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?

Assume that any mean difference is significant. Describe the effects for the table below:   B1 B2 A1 18 22 A2 22 26

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

In an independent-measures study with n = 8 in each treatment, the data produces M = 86 for the first treatment and M = 82 for the second treatment, with a pooled variance of 16. What is Cohen’s d for these data?

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?