Researchers for an advertising company are interested in determining if people are more likely to spend more money on beer if advertisers put more beer ads on billboards in a neighborhood in Philadelphia. They estimate that 250 people will view their billboard in one week. They determine that the total number of residents in the neighborhood is 600. So the residents who have not viewed the billboard are in the control group. The researchers determined that those who did view the ads spent $24 per week on beer and those who did not view the ads spent $16 per week on beer. (Hint: the researchers determined the Std. Dev. for the control is $1.3 and the Std. Dev. for the treatment is $0.90)