comparison Chapter 12 Homework 1. Betty wants to know if eating chocolate makes people laugh more. To that end, she designs a study where people are divided into three groups - one group eats no chocolate, one group eats a bit of chocolate and one group eats a lot of chocolate. Betty recruits 15 people for her study and randomly assigns each person to one of the three groups. The 15 people spend a week in their respective groups and then all people are shown the same comedic video. Betty records how much time each person spends laughing. The data follows. Does eating chocolate make people laugh significantly more? (i.e., what can Betty conclude?) No chocolate Bit of chocolate Lots of chocolate T=99 n=5 M=19.8 T=135 n=5 M=27 T=280 n=5 M=56 SS=260.8 SS=194 SS=858