E-PolyLearning

51. The class of variable which can accept only the values from set of integers is classified as
a. discrete random variable
b. continuous random variable
c. posterior random variable
d. interior random variable
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Answer: (a).discrete random variable

52. 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
a. 4.8
b. 1.8
c. 2.8
d. 3.8
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Answer: (b).1.8

53. If the rate of occurrences in Poisson probability distribution is smaller and the occurrences have large numbers then the distribution tends to be
a. negatively skewed and mesokurtic
b. positively skewed and mesokurtic
c. symmetrical and leptokurtic
d. symmetrical and mesokurtic
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Answer: (d).symmetrical and mesokurtic

54. The selling price of product is subtracted from purchasing price of product to calculate
a. profit of product
b. loss of profit
c. cumulative average
d. weighted average
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Answer: (a).profit of product

55. The process in which the trials are statistically independent and each trial of event has only two outcomes is classified as
a. Bernoulli process
b. Bayes process
c. functional process
d. independent limited process
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Answer: (a).Bernoulli process