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

In general, if the variance of the difference scores increases, then what will happen to the value of the t statistic? Hint: variance of the difference score is in the denominator.

A sample of n = 25 scores has a mean of M = 40 and a variance of s2 = 100.  What is the estimated standard error for the sample mean?

If the sample size is held constant, which of the following will produce the widest 90% confidence interval for the population mean difference for a repeated-measures study?

An English teacher is looking at the scores of her students’ latest essay: 4, 8, 6, 9, 5. Calculate the value of Sigma(X*10) for the data.

Although a research study is typically conducted with a relatively small group of participants known as a ____, most researchers hope to generalize their results to a much larger group known as a ____.

A sample of n = 25 scores has a mean of M = 40 and a variance of s2 = 100.  What is the estimated standard error for the sample mean?

If the sample size is held constant, which of the following will produce the widest 90% confidence interval for the population mean difference for a repeated-measures study?

What is measured by the denominator of the z-score test statistic?

A sample of difference scores has a mean of 5 with a variance of 100.  If effect size is measured using Cohen’s d, what is the value of d?