Refer to the study of obese people on a low-fat diet and a regular diet presented in Example 9.1. Another way to compare the mean weight losses for the two different diets is to conduct a test of hypothesis. Suppose we want to determine if the low-fat diet LO5 is more effective than the regular diet. Use the information on the SPSS printout shown in Figure 9.1 to conduct the test at a = .05.