The freshmen competed with the sophomores to see who could raise the most money by recycling.The appropriate design for testing the significance of the difference between the means is
A)related samples t-test.
B)independent samples t-test.
C)one-sample t-test.
D)z-test.

Question

Quizplus · Accepted Answer

An independent samples t-test is appropriate for comparing the means of two groups that are independent of each other, such as freshmen and sophomores in this case. A related samples t-test would be appropriate if the same group of students were measured twice (before and after a recycling project) to see if there was a significant change in recycling rates. A one-sample t-test would be appropriate if only one group (either freshmen or sophomores) was being compared to a known population mean. A z-test would be appropriate for large sample sizes with known population parameters, which is not provided in this scenario.

The Freshmen Competed with the Sophomores to See Who Could