For the following situations, write out a research hypothesis:
a. Bob wants to know if the weight loss for his group on the chocolate-only diet is representative of weight loss in a large population of middle-aged men who are on a proteinonly diet.
b. The health department is charged with finding out if the rate of flu per thousand citizens for this past flu season is comparable to the rate of the last 50 seasons.
c. Blair is almost sure that his monthly costs for the past year are not representative of his costs over the past 20 years.