What do you understand by the selection bias?
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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.
Explain the difference between overfitting and underfitting?
Explain reinforcement learning.
What is the best programming language to use in data science?
Differentiate between skewed and uniform distribution?
Can you explain supervised learning?
Define standard deviation, mean, mode and median.
What is the science of data in simple words?
What is logistic and linear regression? Name some packages in r and python for building regression models.
Can you cite some examples where both false positive and false negatives are equally important?
Can you explain cross-validation?
What is linear optimization? Where is it used?
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