निम्न शब्दों के अंतर

For the recorded observation, the coefficient of variation is 0.2 and the variance is 16. The arithmetic mean is:

If moment generating function of discrete random variable X is (q + pe^t )ⁿ , then E(X²) equals to

For making frequency distribution, the number of classes used depends upon:

Five persons A, B, C, D and E occupy seats in a row at random. The probability that A and B sit next to each other is:

For the discrete distribution, the Pearson's coefficient of skewness β2 is always:

If Z follows standard normal distribution with mean 0 and variance 1, then Z² follows:

If the multiple correlation coefficient of X1 on X2 and X3 is zero, then:

For the random variable X with probability density function f(x) = (x−3)² /5; x = 3, 4, 5, the variance of X is: