We want to see whether a sample of engineering professionals (n = 330) differs in their licensing examination score from the population of engineers in a professional association. The population standard deviation is unknown. What would be the degrees of freedom for this test?
A) 1
B) 2
C) 329
D) 330

Question

Quizplus · Accepted Answer

The degrees of freedom for a one-sample t-test with an unknown population standard deviation is n-1, where n is the sample size. In this case, n = 330, so the degrees of freedom is 330-1 = 329.

We Want to See Whether a Sample of Engineering Professionals