YammerPart of MicrosoftIs this your company?YammerAdd an InterviewAbout55Reviews5,250JobsMoreOverviewCompany OverviewOrganization StructureLocationsFAQ55Reviews5,250Jobs112Salaries80Interviews12Benefits23PhotosFollow+Add an InterviewInterview QuestionData Scientist Interview-San Francisco, CAYammerYou are compiling a report for user content uploaded every month and notice a spike in uploads in October. In particular, a spike in picture uploads. What might you think is the cause of this, and how would you test it?AnswerAdd TagsFlag as InappropriateFlag as InappropriateInterview Answers3 Answers▲13▼We cannot say what has caused the spike since causal relationship cannot be established with observed data. But we can compare the averages of all the months by performing a hypothesis testing and rejecting the null hypothesis if the F1 score is significant.Anonymous on Nov 12, 2016Flag as InappropriateFlag as Inappropriate▲0▼The photos are definitely Halloween pictures. Segment by country and date and check for a continual rise in photo uploads leading up to October 31st and a few days after for the lag. There's also a ton of these product questions like this on InterviewQuery.com for data scientistsIQ on Aug 22, 2019Flag as InappropriateFlag as Inappropriate▲9▼Hypothesis: the photos are Halloween pictures. Test: look at upload trends in countries that do not observe Halloween as a sort of counter-factual analysis.Anonymous on Apr 5, 2013Flag as InappropriateFlag as InappropriateInterviews>YammerAdd Answers or CommentsTo comment on this, Sign In or Sign Up.