| 1. | In binomial probability distribution, the dependents of standard deviations must includes |
| a. | probability of q |
| b. | probability of p |
| c. | trials |
| d. | all of above |
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Answer: (d).all of above
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| 2. | The formula to calculate standardized normal random variable is |
| a. | x - μ ⁄ σ |
| b. | x + μ ⁄ σ |
| c. | x - σ ⁄ μ |
| d. | x + σ ⁄ μ |
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Answer: (a).x - μ ⁄ σ
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| 3. | In random experiment, the observations of random variable are classified as |
| a. | events |
| b. | composition |
| c. | trials |
| d. | functions |
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Answer: (c).trials
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| 4. | In binomial distribution, the formula of calculating standard deviation is |
| a. | square root of p |
| b. | square root of pq |
| c. | square root of npq |
| d. | square root of np |
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Answer: (c).square root of npq
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| 5. | The variance of random variable x of gamma distribution can be calculated as |
| a. | Var(x) = n + 2 ⁄ μ²; |
| b. | Var(x) = n ⁄ μ²; |
| c. | Var (x) = n * 2 ⁄ μ²; |
| d. | Var(x) = n - 2 ⁄ μ³; |
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Answer: (b).Var(x) = n ⁄ μ²;
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