7/27/2019 ANOVAExmpl
2/2
Analysis of Variance
Do these data provide sufficient evidence to conclude that three
training methods lead
to different mean productivity?
Ho: mA = mB = mCH1: One or more m's are not equal
Method A 45 40 50 39 53 44
Method B 59 43 47 51 39 49
Method C 41 37 43 40 52 37
Anova: Single Factor
SUMMARY
Groups Count Sum Average Variance S.D.
Method A 6 271 45.17 30.1667 5.4924
Method B 6 288 48.00 47.6000 6.8993
Method C 6 250 41.67 31.0667 5.5737
All Data Combined 18 809 44.94 39.1144 6.2541
ANOVA
Source of Variation SS df MS F P-value F crit
Between Groups 120.7778 2 60.38889 1.664625 0.222382
6.358846
Within Groups 544.1667 15 36.27778
Total 664.9444 17
45.1748.00
41.67
0.00
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50.00
60.00
70.00
Method A Method B Method C
Productivity Means by Method
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0 1 2 3 4Training Method
Plot of Data Points
