The average of n numbers is 65. If each of 54% of the

Which of the following options is INCORRECT?

If moment generating function of continuous random variable X is (λ /λ−t) ;t < λ, then E(X³) equals to:

For a random variable x, the central moments (µi) of all order exist. The square of (2j + 1)^th   moment (µ²2j+1) is

The grouped data for the observations are

Class:                     1-3          3-5          5-7

For frequency distribution presentation , which option is wrong.

If Arithmetic mean and coefficient of variation of x are 10 and 40 respectively, then the variance of y = 10 – 2x is:

If the first quartile of data set 8,10,8,7,9 is 7.5, then the value of quartile deviation is

For the two variables X and Y, the following observations are tabulated