`Sigma IR=Sigma E` is the mathematical equaiton of

sum IR = sum E is the mathematical equation of

Sigma bonds are

Sigma bonds are :

If barx is the mean and sigma is the standard deviation of a distribution , then the coefficient of variation is ……….a) barx / sigma x100 b) sigma / barx c) sigma / barx x100 d) sigma / barx x50

If sigma _x =10 , sigma _y =10 , then the value of Cov(x,y) is

Give reasons for : Sigma (sigma) bond is stronger thann Pi (pi ) bond.