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Resolved: alternative hypothesis
in the alternative, how is AOV before -AOV after > 0
it should be lower if the new policy is improving the sales
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Resolved: importing scipy
i am getting an error importing scipy.stats, and chi2_contingency
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loading the data
I am trying to load data, but I keep getting attribute error
I used the same code you used.
AttributeError: module...
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to_datetime method
I tried to run this method and save chenges but got an error " RuntimeError: The string provided for NumPy ISO...