SOLUTION: Concerned about Friday absenteeism, management examined absenteeism rates for the last three Fridays in four assembly plants. Does this sample prove that there is a significant dif

Question 195915This question is from textbook
: Concerned about Friday absenteeism, management examined absenteeism rates for the last three Fridays in four assembly plants. Does this sample prove that there is a significant difference in treatment means? Absences
Month Plant 1 Plant 2 Plant 3 Plant 4
4-Mar 19 18 27 22
11-Mar 22 20 32 27
18-Mar 20 16 28 26
This question is from textbook

Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
Concerned about Friday absenteeism, management examined absenteeism rates for the last three Fridays in four assembly plants. Does this sample prove that there is a significant difference in treatment means? Absences
Month Plant 1 Plant 2 Plant 3 Plant 4
4-Mar 19 18 27 22
11-Mar 22 20 32 27
18-Mar 20 16 28 26
---------------------------------
Ho: The means are the same for the 4 Plants
H1: At least one of the means is different
-------------
I ran an ANOVA Test on the 4 columns of data and got the following:
Test statistic: F = 14.18..
p-value = 0.00144
Conclusion:
Since the p-value is less than 5%, reject Ho.
At least one of the means is different.
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Cheers,
Stan H.
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