4 decimals. Thank you!

Application Exercis A cigarette company ran an advertising campaign designed to improve sales. To evaluate their campaign, they had subjects record the average number of cigarettes smoked per day in the week before and one week after exposure to the ad. What can be concluded with an a: of 0.10. The data are below. before after 46 35 17 17 21 12 34 29 31 18 2O 19 34 27 26 26 27 20 41 4|