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The Coca-Cola Company introduced New Coke in 1985. Within three months of this introduction, negative consumer...

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 45 136 134 41 146 33 71 224 111 87
New Coke 6 114 56 14 39 20 42 156 61 140
Pepsi 24 90 100 43 51 42 68 131 74 107

Two-way ANOVA: Cans versus Drink, Building

Source DF SS MS F P
Drink 2 7997.6 3998.80 5.78 0.011
Building 9 55573.5 6174.83 8.93 0.000
Error 18 12443.7 691.32
Total 29 76014.8
Descriptive Statistics: Cans
Variable Drink Mean
Cans Coke Classic 102.8
New Coke 64.8
Pepsi 73.0

(a-1) Calculate the value of the test statistic and p-value. (Round "test statistic" value to 2 decimal places and "p-value" to 4 decimal places.)

(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.)

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