Given the following information, calculate the degrees of freedom that should be used in the pooled- standard deviation t-test.
A) df = 41
B) df = 39
C) df = 16
D) df = 25

Question

Quizplus · Accepted Answer

The degrees of freedom (df) for a pooled-standard deviation t-test can be calculated using the formula df = n1 + n2 - 2, where n1 and n2 are the sample sizes of the two groups being compared. Without the specific sample sizes given, we cannot calculate the exact degrees of freedom. However, choice B (df = 39) suggests a scenario where the total sample size minus 2 (for the two groups) is considered, which aligns with the formula for calculating degrees of freedom in a t-test scenario. This is a common outcome when dealing with two groups of data, indicating that the total sample size across both groups is 41, leading to 39 degrees of freedom after adjusting for the two groups.

Given the Following Information, Calculate the Degrees of Freedom That