dear all , please guide me in calculation of standard deviation it is given that the value of 2 observation 3 and 5 have frequencies f1 and f2 , show that the variance of the observation is given by 4f1f2/(f1+f2)^2 please guide in calculation of variation . regards suresh sharma
Just use the sample mean and sample variance formulae from Chapter 1 of CT3. However, I believe they divided by n not (n-1).
