https://www.youtube.com/watch?v=eAKFg45N154&list=PLEUKy_nwlzwFbxj6ilK2XXHJqBXMcTOOc&index=4
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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
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Hypothesis test
Icecream is 320 gram?
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