The Coca-Cola Company introduced New Coke in 1985. Within three months of this i
ID: 3334855 • Letter: T
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:
Two-way ANOVA: Cans versus Drink, Building
(a-1) Calculate the value of the test statistic and p-value. (Round "test statistic" value to 2 decimal places and "p-value" to 4 decimal places.)
(a-2) At the 0.05 significance level, what is the conclusion?
(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 3 decimal places.)
Building 1 2 3 4 5 6 7 8 9 10 Coke Classic 52 133 124 54 136 34 61 229 124 77 New Coke 6 111 49 49 35 21 37 151 54 152 Pepsi 28 80 102 44 47 42 70 123 74 99Explanation / Answer
a)
a2)
p-value < 0.05
hence
Reject H0
b)
Variable N N* Mean SE Mean StDev Minimum Q1 Median Q3 Maximum
C13 10 0 102.4 18.5 58.6 34.0 53.5 100.5 133.8 229.0
C14 10 0 66.5 16.6 52.5 6.0 31.5 49.0 121.0 152.0
C15 10 0 70.90 9.74 30.79 28.00 43.50 72.00 99.75 123.00