Researchers compared protein intake among three groups of postmenopausal women: (1) women eating a standard American diet (STD), (2) women eating a lactoovo-vegetarian diet (LAC), and (3) women eating a strict vegetarian diet (VEG). The mean 1 sd for protein intake (mg) is presented in Table 12.29. *12.4 Suppose that in the general population, 70% of vegetarians are lacto-ovo-vegetarians, whereas 30% are strict vegetarians. Perform a statistical procedure to test whether the contrast L y = + 07 03 2 3y y 1 . . is significantly different from 0. What does the contrast mean? 12.5 Using the data in Table 12.29, perform a multiplecomparisons procedure to identify which specific underlying means are different.