Question

1. The Coca-Cola Company introduced new Coke in 1985. Within three months of this introduction, negative consumer reaction forced Coca-Cola to reintroduce the original formula of Coke as Coca-Cola classic. Suppose that two years later, a marketing research firm in Chicago compared the sales of Coca-Cola classic, new Coke, and Pepsi in public vending machines. To do this, marketing selected random buildings in Chicago that have both Colas. The data (in cans) are as follows:

Coke Classic	45	136	134	41	146	33	71	224	111	87
New Coke	36	114	56	14	39	20	42	156	61	140
Pepsi	24	90	100	43	51	42	68	131	74	107

Assuming sales were generally normally distributed for each group, use a 0.1% significance level to determine if there is a difference in sales levels amid the three Colas (use critical values)

Answer 1