| 1 |
An expected value of a random variable is equal to its. |
- A. Variance
- B. B.D.
- C. Mean
- D. Co - Variance
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| 2 |
Random number can be generated manully by |
- A. Dawing cards from numbered cards
- B. Roitaing or spinning numbered wheels
- C. Use of random numbers table
- D. All of these
|
| 3 |
In a discriete probability distribution the sum of all the probabilities is alwyas |
|
| 4 |
If X and Y are independent random variables , the E (XY) is equal to. |
- A. E(XY)
- B. E(X) E(Y)
- C. XE(Y)
- D. YE(X)
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| 5 |
The parameters of the binomial distributions are |
- A. x and n
- B. x and p
- C. p and q
- D. n and p
|
| 6 |
Probility density function is the probebilyt function of.............. random variable. |
- A. Discrete
- B. Qualitative
- C. Continuous
- D. None
|
| 7 |
For a binomial probability distribution:<div>n = 10 & the probability of failure (q =0.6), then mean of the distribution is .</div> |
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| 8 |
Variance of binomial distribution is |
- A. np
- B. <span style="color: rgb(0, 0, 0); font-family: 'Lucida Sans Unicode', 'Lucida Grande', sans-serif; font-size: 18px; line-height: 23.390625px;">√</span>npq
- C. npq
- D. nq
|
| 9 |
Random numbers can be generated |
- A. Manually
- B. Mechanically
- C. Botha a and b
- D. None of these
|
| 10 |
If x is a continuous random vriable, then the function f (x) is. |
- A. A probability function
- B. A probability denaity function
- C. A density function
- D. Both b and c
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