Measures of Dispersion
KeyPoint:
Range (R)
Inter Quartile Range
Quartile deviation (QD)
Mean deviation
Standard deviation
A) Range (R): It is the difference between the highest and the lowest value of the series.
R= H-L where H is the highest value and L is the lowest value.
coefficient of R = H-L / H+L
Find them
(A) Individual series:
find R and Coef. of R
if
3,8,2,5,6,9,10
sol: R = H-L
= 10-2
coef. of R = H-L / H+L
= 10-2/10+2
= 8/12
= 0.67
(B) Discrete Series:
same formula
Tags:
Economics