Josh and Kendra each calculated a 90% confidence interval for the difference of means using a Students

Question:

Josh and Kendra each calculated a 90% confidence interval for the difference of means using a Student’s t for random samples of size n1 = 20 and n2 = 31. Kendra followed the convention of using the smaller sample size to compute d.f. = 19. Josh used his calculator and Satterthwaite’s approximation and obtained d.f. ≈ 36.3. Which confidence interval is shorter? Which confidence interval is more conservative in the sense that the margin of error is larger?
Distribution
The word "distribution" has several meanings in the financial world, most of them pertaining to the payment of assets from a fund, account, or individual security to an investor or beneficiary. Retirement account distributions are among the most...