The degrees of freedom for a t-test for independent groups are A)(n₁ + n₂)- 1. B)(n₁ + n₂)- 2. C)N - 1. D)2(N)- 1.

Question

Quizplus · Accepted Answer

The formula for degrees of freedom for a t-test for independent groups is (n1-1)+(n2-1), which simplifies to n1+n2-2. In this case, n1=n2=nS1U1B1S1U1B0+nS1U1B2S1U1B0, so the degrees of freedom are (nS1U1B1S1U1B0+nS1U1B2S1U1B0)+(nS1U1B1S1U1B0+nS1U1B2S1U1B0)-2, which simplifies to (nS1U1B1S1U1B0+nS1U1B2S1U1B0)*2-2, which further simplifies to (nS1U1B1S1U1B0+nS1U1B2S1U1B0)*2-1. Therefore, the correct answer is B.

The Degrees of Freedom for a T-Test for Independent Groups