You are trying to determine if there is a significant difference in the mean age between patients who have developed a nosocomial infection in your hospital (N=312) and those who have not (N=4,673). What would be an appropriate test to use?
A) Chi-square
B) McNemar's test
C) t-test for dependent groups
D) t-test for independent groups

Question

Quizplus · Accepted Answer

A t-test for independent groups is appropriate here because you are comparing the means of two separate groups (patients with and without nosocomial infections) to see if there is a significant difference in their ages.

You Are Trying to Determine If There Is a Significant