Coefficient of range is also known as coefficient of dispersion
Coefficient of dispersion= (Xm-Xo)/(Xm+Xo)
Xm= maximum value of data
Xo=lowest value of data
Coefficient of quartile deviation= (Q3-Q1)/(Q3+Q1)
Q3= third quartile
Q1=first quartile
If X and Y are two random variables then Coefficient of correlation
= {sum(x-mean of x)(y- mean of y)}/{sum(x- mean of x)2* sum(y- mean of y)2}1/2
Coefficient of regression
={n*sum of x*y –(sum of x)(sum of y)}/{ n( sum of x2)- (sum of x)2}
Coefficient of dispersion= (Xm-Xo)/(Xm+Xo)
Xm= maximum value of data
Xo=lowest value of data
Coefficient of quartile deviation= (Q3-Q1)/(Q3+Q1)
Q3= third quartile
Q1=first quartile
If X and Y are two random variables then Coefficient of correlation
= {sum(x-mean of x)(y- mean of y)}/{sum(x- mean of x)2* sum(y- mean of y)2}1/2
Coefficient of regression
={n*sum of x*y –(sum of x)(sum of y)}/{ n( sum of x2)- (sum of x)2}
