A correlation coefficient shows that smoking and life expectancy are indeed related. As a result, a researcher could predict that if the direction of the relationship is known. if a person smokes a lot of cigarettes, he or she will have less money monthly to buy gas the person's life expectancy will go up or down based on the number of cigarettes the person smokes daily if a person smokes cigarettes, he or she will eventually develop lung cancer a person's lungs will repair themselves and he or she will live a longer life.