GMAT Statistics Lesson Video #3 | Statistics Theory | Range, Median and Mode

GMAT Online Preparation | GMAT Statistics Lesson Video
Includes definition of Range, Median and Mode and how to compute each of them. You will find answers with illustrative examples to the following questions
1. How is Range computed?
2. What does Range signify?
3. What is Median?
4. How to compute median for an odd number of observations?
5. How to compute median for an even number of observations?
6. What happens to the median when an equal number of observations are added on either side of the median?
7. Conversely, what happens to the median when more observations are added to one side of the median?
8. What does the median signify for a very large set of data?
9. What is mode?
10. What is a bimodal / trimodal data set? What is a multimodal data set?
11. Can a set of observations have no mode at all?
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[@ashishsinha9035]

Good

[@Wizako]

Thanks!! 🙌

[@rithikasuma5996]

Good..

[@Wizako]

Thank you! Best Wishes!

[@shrutighughal8171]

Adding how many data will shift median how many spaces to left or right? Here u moved median only one space to left when added two data to left so what if I add five data to left ?

[@Wizako]

Hello Shruti,
Perhaps it would be easier for you to think about the median as the middlemost value in a data set.
If it is a set with an odd number of data, it is the middlemost value. [(n+1)/2]
If it is a set with an even number of data, it is the average of the two middlemost values.
To answer your question specifically, let's say the set you have has 7 values.
The median is the 4th value.
Now, let's say you add 5 values to the left of the median.
You now have 12 values.
The median will be the average of the 6th and 7th values.
Since the 4th value from the first set will now be the 9th value, you can say that your median has shifted 2-3 values to the left.
Cheers.