Suppose you take two random samples of dieters to show that those on a Low-Carb Diet lose more weight than those on a Low-Fat Diet. Use the following table to test the hypothesis Ho: 413 42 versus H1: Mi > U2 at 0.05 level of significance (Assume that the population variances are equal but unknown). What is the pooled-variance? Weight Loss (in pounds) Mean Variance Observations Pooled Variance Low-Carb Diet Group 1 9.70 3,45 25 Low-fat Diet Group 2 8.30 3.10 40 Select one: 3.076 None of these are correct 3,674 3.157 3.233