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statistics - Coggle Diagram
statistics
variance =S^2
when the sample size increase, variance reduced
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why divide by n-1, because the sample mean is the smallest possible. We need to inflate the variance by divide n-1 instead of n
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p values
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p< .05 , it is less likely
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bimodal distribution, skew distribution
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hyposthesis test
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rejection standard is subjective, normally is 5%
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