Find out quartile deviation and coefficient of quartile deviation of the following series.
Wages of 9 workers in Rs. are 170, 82, 110, 100, 150, 150, 200, 116, 250
Rearranging the wages, we get
82, 100, 110, 116, 150, 150, 170, 200, 250
Calculate the mean deviation about mean and standard deviation for the following distribution:
|
Classes |
Frequencies |
|
20–40 |
3 |
|
40–80 |
6 |
|
80–100 |
20 |
|
100–120 |
12 |
|
120–140 |
9 |
|
50 |
A measure of dispersion is a good .supplement to the central value in understanding a frequency distribution. Comment
Define dispersion.
How many methods are there to calculate dipersion?
Define range.
Define quartile deviation.
How is coefficient of quartile deviation calculated?
Define mean deviation.
Define standard deviation.
Give formula to calculate standard deviation of a frequency destribution series by direct method.
Mock Test Series
