https://www.youtube.com/watch?v=sWaSQovzunI&list=PLEUKy_nwlzwFbxj6ilK2XXHJqBXMcTOOc&index=2&t=0s ================================================================================ Why you should learn probability on statistics? - because you can't perform "total inspection" ================================================================================ So, you perform "sample inspection" sample=extract_sample(population) statistic_value_from_sample=sample_inspection(sample) statistic_from_population: which is what you really want to know ================================================================================ error=statistic_from_population-statistic_value_from_sample ================================================================================ The range of error: - confidence interval - hypothesis test By using probability, people determin "confidence interval" confidence_interval=predict_confidence_interval(statistic_value_from_sample) ================================================================================ hypothesis test - Your exclaim: value should have been here - Calculate "confidence interval" - If statistic_value_from_sample is involved in "confidence interval" your exclaim is false ================================================================================