GMAT Online Coaching | GMAT Statistics & Averages | Chapter Revision and Recap

A 10 minute recap and revision of all the concepts covered in the 20+ videos in this topic.
What is covered?
1. How to compute average, sum and number of elements?
2. What is the standard framework to solve questions that test concepts in Averages?
3. What is weighted average and how to compute weighted average? What is the formula for weighted average?
4. What is Range? How to compute Range for a set of numbers?
5. What is median? How to compute median for an odd number of observations? How to compute median for an even number of observations?
6. What does mean signify? What is the median for a large set of data?
7. What is the effect of adding an equal number of observations to either side of the median?
8. What is the effect of adding more elements to one side of the median?
9. What is mode? What is a multi modal distribution?
10. What is it mean “there is no mode”?
11. How to compute standard deviation?
12. What is standard deviation?
13. Alternative formula to find standard deviation
14. What happens to the SD of a set of numbers when a constant ‘k’ is added to or subtracted from each element in a set?
15. What happens to the SD of a set of numbers when a constant ‘k’ is multiplied with or a ‘k’ divided each element in a set?

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