How do you replace missing values in data
How do handle duplicate values values
How do you validate your results

Question

How do you replace missing values in data
How do handle duplicate values  values 
How do you validate your results

Anonimo · Accepted Answer

Replace with median because mean might be affected by outliers
You can either remove duplicates values,in-case if you want to join tables,you can create composite key to avoid duplicates 
Do data quality check to verify your results.Reconcillation

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