Solved: A random sample of smokers was obtained, and eachindividual was classified both

Chapter 14, Problem 31

(choose chapter or problem)

A random sample of smokers was obtained, and eachindividual was classified both with respect to gender andwith respect to the age at which he/she first started smoking.The data in the accompanying table is consistentwith summary results reported in the article CigaretteTar Yields in Relation to Mortality in the CancerPrevention Study II Prospective Cohort (British Med. J.,2004: 7279)."a. Calculate the proportion of males in each age category, andthen do the same for females. Based on these proportions,does it appear that there might be an association betweengender and the age at which an individual first smokes?b. Carry out a test of hypotheses to decide whether there isan association between the two factors."