1 |
Which of the following distribution(s) has 3 parameters. |
- A. Binomial distribution
- B. Hypergeometric distribution
- C. Both of the above
- D. None of these
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2 |
The probability of success ------------ from one trial to another when trials are dependent |
- A. Remains constant
- B. Is changed
- C. One
- D. Zero
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3 |
if X and Y are independent random varaibesl the S.D. (X-Y) is equal to |
- A. Var (X) - var (Y)
- B. Var (X) + Var (Y)
- C. E(X-Y)2
- D. E(X + Y)2
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4 |
The binomial distribution has the following parameters. |
- A. p & q
- B. n & q
- C. n, p & q
- D. None of these
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5 |
When X denotes the number of success in binomial experiment, it is called. |
- A. Random variable
- B. Binomial random variable
- C. Continuous random variable
- D. Both (B) and (C) but not (A)
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6 |
Binomial distribution is positively skewed |
- A. P < 1/2
- B. P > 1/2
- C. P = 1/2
- D. P < q < <sup>1</sup>/<sub>2</sub>
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7 |
In a discriete probability distribution the sum of all the probabilities is alwyas |
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8 |
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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9 |
Random numbers are generated from the single digit numbers. |
- A. { 1,2,3,............. 10 }
- B. { 0, 1,2,.......................... 10}
- C. { 0,1,2.............}
- D. {0,1,2,............. 9}
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10 |
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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