This is personal study note Copyright and original reference: https://www.youtube.com/watch?v=bI8hSPc3uJo&list=PLsri7w6p16vsOVj5cL8U4z0m4RdMZfhme&index=2&t=0s ================================================================================ ANOVA (Analysis of variance) - about over 3 groups - analysis method which tests "mean difference" - for test hypothesis, it uses f-distribution ================================================================================ ================================================================================ Onee way ANOVA ================================================================================ Two way ANOVA satisfaction group1 satisfaction group2 factors: - conveninent store - location ================================================================================ Multi way ANOVA ================================================================================ Multi variate ANOVA ================================================================================ ANOVA ================================================================================ 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 ================================================================================ The case where variance of population is different ================================================================================