For the data set

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:

The probability of getting 9 cards of the same suit in one hand at a game of bridge is

Which of the following correctly completes the given statement?

Index number helps in:

(I) determining the cost of living

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

If the population kurtosis of the observations 16,12,6,2,4,10 is 1.7414, then population kurtosis of the 8,6,3,1,2,5 is

Which of the following methods is NOT used in computation of a seasonal index for time series?

The variation among the observations of each specific class is known as:

If the first, second, and third moment about the origin are 2, 8, and 18 respectively, then third moment about mean is