Q1) Based on data from Hispaoic health and nutrition examination survey, mean serum cholesterol for Mexican American males ages 20 to 74 was 203 mg/dl. The standard deviation was approximately 44mg/dl. Suppose that serum cholesterol follows normal distribution. Determine the probability that Mexican American male in the 20 -74 age range has serum cholesterol value greater than 240 mg/dl .

Q2) Infant mortality rate for Pennsylvania for 1983-1985 period was 10.9 per 1000 live births compared to rate of 12.5 for Louisiana. Is it suitable to conclude that Pennsylvania had better record than Louisiana associated to infant mortality? What other variables might be important to consider here? Infant mortality rate for whites in Pennsylvania was 9.4 and it was 20.9 for blacks there. This is contrasted with rates of 9.1 and 18.1 for whites and blacks, respectively in Louisiana. Therefore race specific rates were lower in Louisiana than in Pennsylvania, but overall rate was higher in Louisiana. Describe how this situation could arise.