https://www.youtube.com/watch?v=eAKFg45N154&list=PLEUKy_nwlzwFbxj6ilK2XXHJqBXMcTOOc&index=4 ================================================================================ Statistics for president of country A Sample should be made from country A not country B For president statistics, you should sample from 20- age, not 0-20 ================================================================================ ================================================================================ Hypothesis test Icecream is 320 gram? ================================================================================ ================================================================================