Lec-39: Introduction to Z-Test | Probability and Statistics

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i learn statistics for machine learning very help session thank you so much sir love from Mirzapiur 😅😅

brijeshsahani-ybgj
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sir there's a mistake in the calculation 1600-1700/89= -100/89
and the answere is less than the level of significance
i.e. 1.12<2.23
so, we accept H0.


i'm i right??

hotrare
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why do we have two different formulas for z test? everywhere else, it says that z test can only be calculated by knowing the population standard deviation. If its not known then, we use t-test???

cookiejar
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big fan sir, respect from roman empire

ARYAN_
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Hello sir, This is a right tailed test for which the acceptance condition is Z < Z_alpha why are we taking |Z| ?

NirbhaySharmaBCSE
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Love you sir good work keep it up.love from Pakistan

furqanarshed