If 'p', 'q' and 'n' are probability pf success, failure and number of trials respectively in a Binomial Distribution, what is its Standard Deviation?

1. (np)2
2. np
3. pq
4. npq

For a binomial probability distribution; the probability of failure is 2/3 and variance is 40/9. The number of independent trials is _______________.

1. 4
2. 40
3. 20
4. 5/4

Hypergeometric probability of hypergeometric distribution function is given by the formula _________

1. h(x; N, n, k) = [kCx] [N-kCn-x] / [NCn]
2. h(x; N, n, k) = [kCx] [N-kCn] / [NCn]
3. h(x; N, n, k) = [kCx] [NCn-x] / [NCn]
4. h(x; N, n, k) = [kCx] [N-kCn-x] / [N-kCn]

If Mean = 4 and p = 1/3 than the value of independent trials, variance and Standard deviation is:

1. 12, 8/3, 13/8
2. 12, 3/13, 8/13
3. 12, 8/3, 8/13
4. 12, 3/8, 13/8

The p.d.f of Poisson Distribution is given by ___________

1. (e-*x)/x!
2. (e-x*x)/x!
3. (e-*x)/x!
4. (e-*x)/ !