Does the data in the table below indicate that the exposed cohort smoked more than the U.S. population sample? Smoking causes an approximate tenfold increase in larynx cancer rates (smokers versus nonsmokers).
Cigarette Smoking Data for the Cohort and the U.S. as of 1965
Cohort
U.S.
Percentage never smoked cigarettes Percentage current, 1 pack or less Percentage current, more than 1 pack Percentage former