# Exercise 1 - New York City /r/ with Rbrul - GoldVarb-esque logistic regression with categorical predictors
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# Use data in .csv file "http://www.danielezrajohnson.com/ds.csv".
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# Question 1: which of the factor groups has a statistically-significant effect on the use of /r/, and which of their factors favor and 
disfavor /r/, and to what extent?