A researcher collects sample data by randomly selecting 15 hospital employees from each of the income categories: $80,000. This type of sampling is A. stratified B. convenience C. random D. cluster E. systematic Public health advocates claim a large area of a major city is a food desert. From that area, 10 city blocks are randomly selected and all residents in those blocks are surveyed about where they purchase groceries. This type of sampling is A. convenience B. random C. stratified D. cluster E. systematic At a large clinic the data manager wanted to categorize the overall cholesterol (HDL and LDL) into categories 100-149, 150-199, 200-249, 250-299 (mg/dL) for its adult male patients. Using the frequency table created for these categories, the cumulative frequency table is: Cumulative Frequency Cholesterol < 150 68 < 200 180 < 250 262 < 300 300 How many male patients are in the class 200-249?