Author: Anonymous

One sample has n = 10 scores and a variance of s2 = 20, and a second sample has n = 15 scores and a variance of s2 = 30.  What can you conclude about the pooled variance for these two samples?

With alpha = .01 the two-tailed critical region for a t test using a sample of n = 16 subjects would have boundaries of ____.

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

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?

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

With alpha = .01 the two-tailed critical region for a t test using a sample of n = 16 subjects would have boundaries of ____.

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?

A graduate student is conducting a research study to determine if 3 different brands of pre-workout supplements affect the rate of muscle growth. In each treatment, the researcher uses a sample of n = 10 in each treatment. Given, SSBG = 54 and SSWG = 180, calculate the F-ratio.

A researcher is curious about the average monthly cell phone bill for high school students in the state of Florida.  If this average could be obtained, it would be an example of a ____.

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?