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What is a z test, chi square test, f test and t test?
A test has a true positive rate of 100% and false positive rate of 5%. There is a population with a 1/1000 rate of having the condition the test identifies. Considering a positive test, what is the probability of having that condition?
Where linear optimization is used?
What are the different performance metrics for evaluating Uber services?
What is a document database?
Do we have different selection biases, if yes, what are they?
Can you explain interpolation and extrapolation?
What is missing value imputation?
What is the degree of freedom for lasso?
How do you use sql in sas, python, r languages?
How make you 3d plots/visualizations using numpy/scipy?
What do you understand by confusion matrix?
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.
How do you do for loops in python and r?
What are the metrics you will use to track if Uber's paid advertising strategies to acquire customers work? How will you figure out the acceptable cost of customer acquisition?
