A Random Sample of 20 Statistics Students Was Given 15

Multiple Choice

A random sample of 20 statistics students was given 15 multiple-choice questions and 15 open-ended questions-all on the same material. The professor was interested in determining which type of questions the students scored higher. This experiment is an example of:

A) a one sample test of means.
B) a two sample test of means.
C) A paired t-test.
D) a test of proportions.