Analysis of Variance (ANOVA) |
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Jay Arthur
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Analysis of variance (ANOVA) can help you determine if two or more samples have the same "mean" or average. This is a form of "hypothesis testing." The null hypothesis is that the means are equal:
The alternate hypothesis is that the means are not equal:
The goal is to accept or reject the null hypothesis (i.e., the samples have different means) at a certain confidence level (95% or 99%). Excel and the QI Macros can perform:
ANOVA Assumptions ANOVA assumes three things:
Other Statistical Tests in the QI MacrosAnalysis of Variance is just one of the tools included in the QI Macros for Excel SPC Software for Excel.
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