Both of these are obviously very easy to calculate from the actual data. For our control group, the sample mean is 7.40 pounds for group 2. Our sample mean here for the control is 7.40, with a sample standard deviation of 4.04 pounds. If we look at it superficially, it looks like the low-fat group lost more weight, just based on our samples, than the control group. If we take the difference of the low-fat group, or between the low-fat group and the control group, we get 9.31 minus 7.40 is equal to 1.91. The difference of our samples is 1.91. So just based on what we see, it says maybe you lose an incremental 1.91 pounds every 4 months if you are on this diet.