Probability Distributions(Business Statistics ) Questions and Answers
Question 1. In binomial probability distribution, the dependents of standard deviations must includes
probability of q
probability of p
trials
all of above
Explanation:-
Answer: Option D. -> all of above Answer: (d).all of above
Question 2. In binomial distribution, the formula of calculating standard deviation is
square root of p
square root of pq
square root of npq
square root of np
Explanation:-
Answer: Option C. -> square root of npq Answer: (c).square root of npq
Question 3. The variance of random variable x of gamma distribution can be calculated as
Var(x) = n + 2 ⁄ μ²;
Var(x) = n ⁄ μ²;
Var (x) = n * 2 ⁄ μ²;
Var(x) = n - 2 ⁄ μ³;
Explanation:-
Answer: Option B. -> Var(x) = n ⁄ μ²; Answer: (b).Var(x) = n ⁄ μ²;
Question 4. The formula to calculate standardized normal random variable is
x - μ ⁄ σ
x + μ ⁄ σ
x - σ ⁄ μ
x + σ ⁄ μ
Explanation:-
Answer: Option A. -> x - μ ⁄ σ Answer: (a).x - μ ⁄ σ
Question 5. In random experiment, the observations of random variable are classified as
events
composition
trials
functions
Explanation:-
Answer: Option C. -> trials Answer: (c).trials
Question 6. The class of variable which can accept only the values from set of integers is classified as
discrete random variable
continuous random variable
posterior random variable
interior random variable
Explanation:-
Answer: Option A. -> discrete random variable Answer: (a).discrete random variable
Question 7. If the rate of occurrences in Poisson probability distribution is smaller and the occurrences have large numbers then the distribution tends to be
negatively skewed and mesokurtic
positively skewed and mesokurtic
symmetrical and leptokurtic
symmetrical and mesokurtic
Explanation:-
Answer: Option D. -> symmetrical and mesokurtic Answer: (d).symmetrical and mesokurtic
Question 8. If the total number of elements with some specific characteristics is 18 from a population of 40 and the sample is drawn without replacement with the size of 4 then the mean of hyper geometric probability distribution is
4.8
1.8
2.8
3.8
Explanation:-
Answer: Option B. -> 1.8 Answer: (b).1.8
Question 9. The selling price of product is subtracted from purchasing price of product to calculate
profit of product
loss of profit
cumulative average
weighted average
Explanation:-
Answer: Option A. -> profit of product Answer: (a).profit of product
Question 10. The process in which the trials are statistically independent and each trial of event has only two outcomes is classified as
Bernoulli process
Bayes process
functional process
independent limited process
Explanation:-
Answer: Option A. -> Bernoulli process Answer: (a).Bernoulli process