Anova and confidence intervals
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Using the confidence intervals: 95%
Determine which groups differ in average shelf life.
A B C D
94 88 76 82
100 89 69 80
90 88 76 82
97 83 79 78
101 79 80 89
90 82 72 80
give test statistic, hypothesis, decision rule and hypothesis
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Solution Summary
The expert examines an ANOVA and confidence interval. The average shelf life of different groups are given. The solution answers the question(s) below.
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Null Hypothesis:
Ho: mu1 - mu2 = 0
Alternative hypothesis:
H1: mu1 - mu2 != 0
Mean calculations:
<A> = sum(A)/6 = 572/6 =95.33
<b> = 509/6 = 84.83
<C> = 452/6 = 75.33
<D> = 491/6 = 81.83
sum((A-<A>)^2) = 115.33
sum((B-<b>)^2) = 82.83
sum((C-<C>)^2) = 87.83
sum((D-<D>)^2) = 72.57
If t(calculated) > t(table) => Ho rejected
for any combination: (like A and B)
sqrt((1/n1) + ...
Education
- BEng, Allahabad University, India
- MSc , Pune University, India
- PhD (IP), Pune University, India
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