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why is data cleaning important for analysis?
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How make you 3d plots/visualizations using numpy/scipy?
How do you take millions of users with 100's of transactions each, amongst 10000's of products and group the users together in a meaningful segments?
What is the difference between an iterator, generator and list comprehension in Python?
What cross validation technique would you use on time series data set? Is it k-fold or loocv?
Explain the differences between univariate and bivariate analysis?
What is an example of a data set with a non-gaussian distribution?
Explain the role of activation function?
What is need of principal component analysis?
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Explain data wrangling?
You have two tables-the first table has data about the users and their friends, the second table has data about the users and the pages they have liked. Write an SQL query to make recommendations using pages that your friends liked. The query result should not recommend the pages that have already been liked by a user.
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