Write the formula to calculate r-square?

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You are about to get on a plane to Seattle, you want to know whether you have to bring an umbrella or not. You call three of your random friends and as each one of them if it's raining. The probability that your friend is telling the truth is 2/3 and the probability that they are playing a prank on you by lying is 1/3. If all 3 of them tell that it is raining, then what is the probability that it is actually raining in Seattle.

0 Answers   Facebook,

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A disc is spinning on a spindle and you don't know the direction in which way the disc is spinning. You are provided with a set of pins.How will you use the pins to describe in which way the disc is spinning?

0 Answers   Google,

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How is data modeling different from database design?

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What are the important skills to have in python with regard to data analysis?

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What are eigenvalue and eigenvector?

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How will you test that there is increased probability of a user to stay active after 6 months given that a user has more friends now?

0 Answers   Facebook,

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You are given two tables- friend_request and request_accepted. Friend_request contains requester_id, time and sent_to_id and request_accepted table contains time, acceptor_id and requestor_id. How will you determine the overall acceptance rate of requests?

0 Answers   Facebook,

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What is the difference between supervised and unsupervised methods?

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Define the term deep learning?

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What is pylab?

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What is the importance of selection bias?

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