STATISTICAL TECHNIQUES AND TOOLS
ANALYSIS OF VARIANCE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The following are assumptions for ANOVA except:
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Variance must be homogenous
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There should be 4 or more independent groups
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Data must be normally distributed
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Randomly selected
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Explanation:
Detailed explanation-1: -Potential assumption violations include: Implicit factors: lack of independence within a sample. Lack of independence: lack of independence between samples. Outliers: apparent nonnormality by a few data points.
Detailed explanation-2: -Each group sample is drawn from a normally distributed population. All populations have a common variance. All samples are drawn independently of each other. Within each sample, the observations are sampled randomly and independently of each other. Factor effects are additive.
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