ets of paper and clearly label your problems. 1. Does influenza vaccines reduce the risk of influenza illness? A flu vaccine study enrolled patients 6 months of age or older who presented with acute respiratory illness at ambulatory care clinics in geographically diverse U.S. sites. Among 6800 eligible partic- ipants, 60%% got a flu shot before the study and 1300 tested positive for influenza virus. Among those got a flu shot, 558 tested positive. (a) What is the explanatory variable in the study? Is it categorical or quantitative? If it is categorical, how many categories? (b) What is the response variable in the study? Is it categorical or quantitative? If it is categorical, how many categories? (c) Construct a table to display the data. Please have rows represent the explanatory variable and columns represent the response variable. (d) Calculate the proportion of testing positive for influenza for participants who did not have a flu shot. (e) Calculate the proportion of testing positive for influenza for participants who had a flu shot. (f) Calculate and interpret a 95% CI for the difference in proportion of testing positive for influenza among unvaccinated versus vaccinated participants. Do you think whether or not influenza vaccines reduce the risk of influenza illness? Why or why not? (g) Perform a 4C's analysis to see whether or not influenza vaccines reduce the risk of influenza illness? quantitative