For a population with µ = 80 and s = 10, what is the X value corresponding to z = –0.50?

If other factors are held constant, which set of sample characteristics is most likely to produce a significant t statistic?

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

An independent-measures study with n = 6 in each sample, produces a sample mean difference of 4 points and a pooled variance of 12.  What is the value for the t statistic?

For any distribution, what is the z-score corresponding to the median?

Which of the following is the correct null hypothesis for a repeated-measures t test?

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

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

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?

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 ____.