To the studythe effect of different sales training methods, the sales managerof

Question

To the studythe effect of different sales training methods, the sales managerof a company randomly assigned trainees to four groups, and eachgroup received training using one of the four different methods(Method A, B, C, or D). The amount of sales (in thousands of$) for each trainee in each of the groups during the first monthafter the completion of the program is listed below. Themanager wants to know if there is a difference in sales among thetraining methods.

TrainingMethod

A        B         C         D

78       99       74       81       

84       86       87        63

86       90       80        71

92       93       83        65

69       94       78        86

73       85                   79

97                   73

91                   70

a.         Conduct anappropriate analysis using Minitab or Excel, and paste the resultshere:

b.         What are thecases for this analysis?

Explanation / Answer

a) Using Minitab we have the following report,

One-way ANOVA: A, B, C,D

Source DF      SS     MS     F        P
Factor    3    1015.2 338.4 5.37 0.006
Error    23 1450.0  63.0
Total    26    2465.2

S = 7.940   R-Sq= 41.18%   R-Sq(adj) = 33.51%

                        Individual 95% CIs For Mean Based on
                        Pooled StDev
Level N    Mean StDev ------+---------+---------+---------+---
A      8 83.750 9.765              (-------*------)
B      6 91.167 5.269                       (-------*-------)
C      7 77.857 5.984       (------*-------)
D      6 74.167 9.261 (--------*-------)
                        ------+---------+---------+---------+---
                           72.0     80.0     88.0      96.0

Tukey 95% Simultaneous Confidence Intervals
All Pairwise Comparisons

Individual confidencelevel = 98.90%

A subtracted from:

    Lower Center   Upper   +---------+---------+---------+---------
B   -4.439   7.417 19.272                    (-------*-------)
C -17.254 -5.893  5.469           (-------*-------)
D -21.439 -9.583  2.272         (-------*-------)
                             +---------+---------+---------+---------
                           -30      -15        0        15

B subtracted from:

    Lower   Center   Upper   +---------+---------+---------+---------
C -25.523 -13.310 -1.096       (-------*-------)
D -29.674 -17.000 -4.326   (--------*-------)
                              +---------+---------+---------+---------
                            -30      -15        0        15

C subtracted from:

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