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On module 2, lesson 1. I would recommend you distinguish your notation (and explain the convention in the text) between statistics for population (uses greek symbols) and for a sample (uses roman symbols). You do it without mentioning it for the population standard deviation (but your formula should have mu inside not x bar). It might be good to also do it for the mean.
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Via email (Sep. 18, 2018):
The text was updated successfully, but these errors were encountered: