Q 25) Na=2000 and Nb=20. What is the degrees of freedom? please round to 3 decimal places.

Please refer to the setup below for the extra credit questions. Each question is worth 5 points, which will be assessed manually after the due date. The degrees of freedom for a t-test in the one-sample case is the simple formula v = N - 1. However, when we are comparing two groups, the degrees of freedom is a more complicated expression: NB N2 (NA-1) NB(NB -1) However, the value this will take is somewhere between the smallest of NA - 1 or NB - 1, and at the upper end NA + NB - 2. Consider the case where the sample standard deviations from each group are o A = 4.1 and OB = 3.9, and the sample sizes are... D Question 23 0 pts ...NA = 20 and NB = 20. What is the degrees of freedom? Please enter your answer rounded to 3 decimal places. D 0 pts Question 24 ..NA = 50 and NB = 20. What is the degrees of freedom? Please enter your answer rounded to 3 decimal places