Given the following information calculate the degrees of fre

Given the following information, calculate the degrees of freedom that should be used in the pooled-variance t test:

s₁² = 4 and n₁ = 16

s₂² = 6 and n₂ = 25
   

a. df = 41
    b. df = 39
    c. df = 16
    d. df = 25

Solution

In a pooled variance t test,

df = n1 + n2 -2

Thus,

df = 16 + 25 - 2 = 39 [ANSWER, B]