Questions and answers for exam Preparation

MCQs

Random Variable And Probability Distributions

Total Questions : 83 | Page 5 of 9 pages

Question 41. If the value of interval a is 4 and the value of interval b is 5 then the variance of uniform distribution is

6.75
4.75
5.75
0.75

Discuss Question

Answer: Option A. -> 6.75
Answer: (a).6.75

Question 42. The type of continuous distribution in which the probability is constant is classified as

rectangular distribution
square distribution
open frequency distribution
class frequency distribution

Discuss Question

Answer: Option A. -> rectangular distribution
Answer: (a).rectangular distribution

Question 43. The formula such as mn ⁄ (m + n)² (m + n + 1) is used to calculate

variance in exponential distribution
variance in alpha distribution
variance in gamma distribution
variance in beta distribution

Discuss Question

Answer: Option D. -> variance in beta distribution
Answer: (d).variance in beta distribution

Question 44. If the z-score of normal distribution is 2.5, the mean of the distribution is 45 and the standard deviation of normal distribution is 3 then the value of x for a normal distribution is

97.5
47.5
37.5
67.5

Discuss Question

Answer: Option C. -> 37.5
Answer: (c).37.5

Question 45. If the number of trials are 8 and the probability of success are 0.65 then the mean of negative probability distribution is

8.65
12.31
5.2
7.35

Discuss Question

Answer: Option B. -> 12.31
Answer: (b).12.31

Question 46. The discrete probability distribution in which the outcome is very small with a very small period of time is classified as

posterior distribution
cumulative distribution
normal distribution
Poisson distribution

Discuss Question

Answer: Option D. -> Poisson distribution
Answer: (d).Poisson distribution

Question 47. Considering the normal distribution, the spread is increased and the height of the curve is decreased for the

smaller value of variance
larger value of variance
larger value of standard deviation
smaller value of standard deviation

Discuss Question

Answer: Option C. -> larger value of standard deviation
Answer: (c).larger value of standard deviation

Question 48. If the μ is equal to 25 then the value of mean for exponential probability distribution is

0.4
0.08
0.07
0.04

Discuss Question

Answer: Option D. -> 0.04
Answer: (d).0.04

Question 49. The type of distribution which is useful when the occurrences of events are constant is classified as

open frequency distribution
class frequency distribution
rectangular distribution
square distribution

Discuss Question

Answer: Option C. -> rectangular distribution
Answer: (c).rectangular distribution

Question 50. If the random samples are drawn without replacement and the population from which samples are drawn is infinite then the method which is not applicable is