The accompanying summary data on total cholesterol level (mmol/l) was obtained from a sample of Asian postmenopausal women who were vegans and another sample of such women who were omnivores ("Vegetarianism, Bone Loss, and Vitamin D: A Longitudinal Study in Asian Vegans and Non-Vegans," European J. of Clinical Nutr., 2012: 75-82).

Calculate and interpret a 99% CI for the difference between population mean total cholesterol level for vegans and population mean total cholesterol level for omnivores (the cited article included a 95% CI).

Diet Sampl Ste Sample Mean Sample StD 5.10 5.55 1.07 1.10 S8 Vegan Omnivore93