To the study the effect of different sales training methods, thesales manager of
ID: 2916515 • Letter: T
Question
To the study the effect of different sales training methods, thesales manager of a company randomly assigned trainees to fourgroups, and each group received training using one of the fourdifferent methods (Method A, B, C, or D). The amount of sales(in thousands of $) for each trainee in each of the groups duringthe first month after the completion of the program is listedbelow. The manager wants to know if there is a difference insales among the training methods.Training Method
A B C D 78
84
86
92
69
73
99
86
90
93
94
85
97
91
74
87
80
83
78
81
63
71
65
86
79
73
70
Conduct a test at the .05 level of significance to determine ifthere is a significant difference among the training methods.Please use the information from the Minitab/Excel results, andplease show all of the steps in the test process.
A B C D 78
84
86
92
69
73
99
86
90
93
94
85
97
91
74
87
80
83
78
81
63
71
65
86
79
73
70
Explanation / Answer
One-way ANOVA: TrainingMethod versus Sales
Source DF SS MS F P
Training method 3 1385.8 461.9 9.84 0.000
Error 23 1079.4 46.9
Total 26 2465.2
S = 6.851 R-Sq= 56.21% R-Sq(adj) = 50.50%
Individual 95% CIs For Mean Based on
Pooled StDev
Level N Mean StDev ----+---------+---------+---------+-----
a 6 80.333 8.595 (------*-------)
b 8 91.875 4.912 (-----*-----)
c 5 80.400 4.930 (-------*------)
d 8 73.500 7.964 (-----*-----)
----+---------+---------+---------+-----
72.0 80.0 88.0 96.0
Pooled StDev =6.851
Tukey 95% SimultaneousConfidence Intervals
All Pairwise Comparisons among Levels of C1
Individual confidencelevel = 98.90%
C1 = a subtracted from:
C1 Lower Center Upper ---------+---------+---------+---------+
b 1.313 11.542 21.771 (------*------)
c -11.402 0.067 11.536 (-------*-------)
d -17.062 -6.833 3.396 (-----*------)
---------+---------+---------+---------+
-15 0 15 30
C1 = b subtracted from:
C1 Lower Center Upper ---------+---------+---------+---------+
c -22.273 -11.475 -0.677 (------*-------)
d -27.845 -18.375 -8.905 (------*-----)
---------+---------+---------+---------+
-15 0 15 30
C1 = c subtracted from:
C1 Lower Center Upper ---------+---------+---------+---------+
d -17.698 -6.900 3.898 (------*-------)
---------+---------+---------+---------+
-15 0 15 30
From the above report it is clear that the training methodB significantly differs from the remaining methodsA, C and D.
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