If given a population mean but not the population’s standard deviation, which test is appropriate?

Kendall got an 80 on her Psychology exam. The mean was 85 and the standard deviation was 2. Tyler got a 75 on his Economics exam. The mean was 80 and the standard deviation was 5. Statistically who did better when the scores are z-scored?

For a population with µ = 40 and s = 8, what is the X value corresponding to z = 1.50?

In an independent-measures ANOVA, dftotal = 9 and dfwithin = 6. What is dfbetween?

On an exam with a mean of 70, you have a score of 65.  Which of the following values for the standard deviation would give you the highest position within the class, or the best score in class relative to other student’s scores?

When comparing three or more groups, why is ANOVA preferred?

A researcher conducts a hypothesis test using a sample of n = 40 from an unknown population  and compares it to a known population mean.  What is the df value for the t statistic?

The classrooms in the Psychology department are numbered from 100 to 108.  A professor records the number of classes held in each room during the fall semester.  If these values are presented in a frequency distribution graph, what kind of graph would be appropriate?

A researcher reports t(22) = 5.30, p < .01 for an independent-measures experiment.  How many individuals participated in the entire experiment?

One sample has n = 5 scores and the second has n = 10 scores.  If the pooled variance for the two sample is 30, then what is the value of the estimated standard error for the sample mean difference?