Q13. What is the difference between "long" ("tall") and "wide" format data?

Q14. What method do you use to determine whether the statistics published in an article (or appeared in a newspaper or other media) are either wrong or presented to support the author's point of view, rather than correct, comprehensive factual information on a specific subject?

Q15. Explain Edward Tufte's concept of "chart junk."

16. How would you screen for outliers and what should you do if you find one?

Q17. How would you use either the extreme value theory, Monte Carlo simulations or mathematical statistics (or anything else) to correctly estimate the chance of a very rare event?

18. What is a recommendation engine? How does it work?

19. Explain what a false positive and a false negative are. Why is it important to differentiate these from each other?

20. Which tools do you use for visualization? What do you think of Tableau? R? SAS? (for graphs). How to efficiently represent 5 dimension in a chart (or in a video)?

t3 get the answers.