Question

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, in 1987, a marketing research firm in Chicago compared the sales of Coca-Cola Classic, New Coke, and Pepsi in public building vending machines. To do this, the marketing research firm randomly selected 10 public buildings in Chicago having both a Coke machine (selling Coke Classic and New Coke) and a Pepsi machine.

The Coca-Cola Data and a MINITAB Output of a Randomized Block ANOVA of the Data:

Building
	1	2	3	4	5	6	7	8	9	10
Coke Classic	41	128	143	35	147	35	68	220	107	94
New Coke	8	105	61	61	37	20	39	138	63	152
Pepsi	31	83	102	36	57	45	64	124	77	101

Two-way ANOVA: Cans versus Drink, Building

Source	DF	SS	MS	F	P
Drink	2	8,121.9	4,060.93	5.50	.014
Building	9	51,680.5	5,742.28	7.77	.000
Error	18	13,297.5	738.75
Total	29	73,099.9

Descriptive Statistics: Cans
Variable	Drink	Mean
Cans	Coke Classic	101.8
	New Coke	63.4
	Pepsi	72.0

(a-1) Calculate the value of the test statistic and p-value. (Round "test statistic" value to 2 decimal places and "p-value" to 3 decimal places.)

Test statistic
p-value

  

(a-2) At the 0.05 significance level, what is the conclusion?

	Reject H0
	Do not reject H0

(b) What is the Tukey simultaneous 95 percent confidence interval for the following? (Negative amounts should be indicated by a minus sign. Round your answers to 2 decimal places.)

	Confidence interval
Coke Classic - New Coke	[ , ]
Coke Classic – Pepsi	[ , ]
New Coke – Pepsi	[ , ]

Answer 1