Fix: Exercise_with_Solutions.ipynb, a slight fix at the step 16 [Getting and knowing your data] #162
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at step 16, change a syntax which leads to an error: order_group.mean()['revenue'] is incorrect. we could not get the mean from all of the columns in order_group (some of them are string), so we need to select column 'revenue', which we just right created, the correct syntax is: order_group['revenue'].mean()
AmiraliToori
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Step 16:
we could not get the mean from all of the columns in order_group (some of them are string), so we need to select column 'revenue' first and then get the mean from them.