Calculate standard deviation for the following sample of exam scores: 6, 7, 4, 5, 8, 9.

If z obtained does not exceed the z critical, what decision do you make?

A researcher performs a hypothesis test using a one-sample t statistic and the results are reported as follows: “t(30) = 3.25, p < .05.” Based on this report, how many individuals were in the sample?

A population has a µ=120 and a standard deviation of 8. If the population distribution is normal, what is the probability of obtaining a sample mean greater than M= 125 for a sample of n=16?

A set of n = 5 pairs of X and Y values has SSX = 16, SSY = 4 and SP = 2.  For these data, the Pearson correlation is ____.

If z obtained does not exceed the z critical, what decision do you make?

What is the difference between a positively and negatively skewed graph?

ANOVA is necessary to evaluate mean differences among three or more treatments, in order to:

For a set of scores, the mean is 8, and the standard deviation is 4. What is the z-score for the score 7?

The sample consists of n = 6 scores. The mean of the scores is M = 20. When a new score is added to the sample, the new mean is M = 21.  What was the new score that was added?