The Coca-Cola Company introduced New Coke in 1985. Within three months of this i
ID: 3246605 • 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: Building 9 115 10 Coke Classic New Coke Pepsl 79 220 48 143 138 42 151 10 106 6 62 42 42 20 32 140 68 137 31 82 104 37 52 4 70 24 6107 Two-way ANOVA: Cans versus Drink, Building DF MS 6.80 7,68 Drink Building9 Error Total 9,728.54,864.23 49,436,1 5,492.90 12,872.9 72,037.5 006 18 29 715Explanation / Answer
Answer:
Test statistic=5.32
P value =0.0153
Reject Ho.
95% CI
coke classic- New coke (5.306, 69.494)
coke classic- pepsi (1.206, 65.394)
New coke- pepsi (-36.194, 27.994)
MINITAB output:
Analysis of Variance
Source
DF
Adj SS
Adj MS
F-Value
P-Value
Drink
2
8415
4207.4
5.32
0.0153
Building
9
45403
5044.7
6.38
0.0004
Error
18
14226
790.4
Total
29
68044
Grouping Information Using the Tukey Method and 95% Confidence
Drink
N
Mean
Grouping
coke classsic
10
105.3
A
pepsi
10
72.0
B
New coke
10
67.9
B
Means that do not share a letter are significantly different.
Tukey Simultaneous Tests for Differences of Means
Difference of Drink Levels
Difference
of Means
SE of
Difference
Simultaneous
95% CI
T-Value
Adjusted
P-Value
New coke - coke classsic
-37.4
12.6
(-69.494, -5.306)
-2.97
0.021
pepsi - coke classsic
-33.3
12.6
(-65.394, -1.206)
-2.65
0.041
pepsi - New coke
4.1
12.6
(-27.994, 36.194)
0.33
0.943
Individual confidence level = 98.00%
corrected result
Answer:
Test statistic=5.26
P value =0.0159
Reject Ho.
95% CI
coke classic- New coke (5.080, 69.320)
coke classic- pepsi (0.980, 65.220)
New coke- pepsi (-36.220, 28.020)
Analysis of Variance
Source
DF
Adj SS
Adj MS
F-Value
P-Value
Drink
2
8321
4160.4
5.26
0.016
Building
9
45612
5068.0
6.40
0.000
Error
18
14250
791.7
Total
29
68183
Tukey Simultaneous Tests for Differences of Means
Difference of Drink Levels
Difference
of Means
SE of
Difference
Simultaneous
95% CI
T-Value
Adjusted
P-Value
New coke - coke classsic
-37.2
12.6
(-69.320, -5.080)
-2.96
0.022
pepsi - coke classsic
-33.1
12.6
(-65.220, -0.980)
-2.63
0.043
pepsi - New coke
4.1
12.6
(-28.020, 36.220)
0.33
0.943
Individual confidence level = 98.00%
Source
DF
Adj SS
Adj MS
F-Value
P-Value
Drink
2
8415
4207.4
5.32
0.0153
Building
9
45403
5044.7
6.38
0.0004
Error
18
14226
790.4
Total
29
68044