A study tests the difference between 15 ants and 15 ladybugs. In this example, the degrees of freedom is ______.
A) 14
B) 15
C) 28
D) 30

Question

Quizplus · Accepted Answer

The degrees of freedom for an independent samples t-test is calculated as follows: DF = N1 + N2 - 2, where N1 and N2 are the sample sizes of the two groups being compared. In this case, N1 = 15 and N2 = 15, so DF = 15 + 15 - 2 = 28. Therefore, the correct answer is C).

A Study Tests the Difference Between 15 Ants and 15