Quick Check 7.7 – Data 100, Summer 2020

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Why is it important to record each of your steps while doing EDA? *

For documentation purposes (so that you remember what you did in case you want to make changes or explain your work to someone else)

For reproducibility (so that others can repeat the same analysis)

Required

In the demo, we looked at this DataFrame.

Which of the following lines of code created the DataFrame above? *

calls.groupby(['City, 'State']).count()

calls.groupby(['City', 'State']).size()

calls[(calls['City'] == 'Berkeley') & (calls['State'] == 'CA')].count()

calls.groupby('City').groupby('State').size()

Why is the value for BLKADDR in the DataFrame above not equal to the values for all other columns? *

BLKADDR has fewer unique values than the other columns (there are more duplicates)

BLKADDR has missing or null values

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