This is personal study note
Copyright and original reference:
https://www.youtube.com/watch?v=bI8hSPc3uJo&list=PLsri7w6p16vsOVj5cL8U4z0m4RdMZfhme&index=2&t=0s
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ANOVA (Analysis of variance)
- about over 3 groups
- analysis method which tests "mean difference"
- for test hypothesis, it uses f-distribution
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Onee way ANOVA
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Two way ANOVA
satisfaction group1
satisfaction group2
factors:
- conveninent store
- location
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Multi way ANOVA
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Multi variate ANOVA
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ANOVA
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Assumption of ANOVA
- Each population should have normal distribution
- Each population should have same variance
- Each sample should be extracted independently (when "location sample" is extracted, it shouldn't affect "conveninent store sample")
- Sample size should be proper
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The case where variance of population is different
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