Question: Public Health and Nutrition The mean daily energy requirement for eight-year-old boys is 2200 calories. An education researcher believes many students in this group do poorly in school because they have an inadequate diet and therefore not enough energy. A random sample of academically at-risk eight-year-old boys was obtained, and their caloric intake was carefully measured for one day. The summary statistics were n = 37, x¯ = 2089. Assume σ = 358.
a. Is there any evidence this group of students has a mean caloric intake below the daily energy requirement? Use a x¯ = 0.05.
b. How would your answer to part (a) change if a 5 0.01?