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
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 | 35 | 130 | 141 | 53 | 139 | 25 | 70 | 240 | 118 | 84 |
New Coke | 7 | 113 | 62 | 16 | 50 | 13 | 37 | 145 | 53 | 145 |
Pepsi | 32 | 81 | 95 | 45 | 48 | 45 | 63 | 122 | 74 | 101 |
Two-way ANOVA: Cans versus Drink, Building |
Source | DF | SS | MS | F | P |
Drink | 2 | 8,923.4 | 4,461.70 | 5.27 | .016 |
Building | 9 | 54,263.9 | 6,029.32 | 7.13 | .000 |
Error | 18 | 15,231.9 | 846 | ||
Total | 29 | 78,419.2 |
Descriptive Statistics: Cans | ||
Variable | Drink | Mean |
Cans | Coke Classic | 103.5 |
New Coke | 64.1 | |
Pepsi | 70.6 |
(a-1) | Calculate the value of the test statistic andp-value.(Round "test statistic" value to 2 decimal places and "p-value" to 4 decimal places.) |
Test statistic | |
p-value |
(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.) |
Confidence interval | |
Coke Classic - New Coke | [,] |
Coke Classic - Pepsi | [,] |
New Coke - Pepsi | [,] |
|
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