E-PolyLearning

81. Considering the normal distribution, the spread is decreased and the height of the curve is increased for the
a. larger value of standard deviation
b. smaller value of standard deviation
c. smaller value of variance
d. larger value of variance
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Answer: (b).smaller value of standard deviation

82. In the classification of probability distributions, the 'Erlang distribution' is also called
a. alpha distribution
b. beta distribution
c. gamma distribution
d. exponential distribution
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Answer: (c).gamma distribution

83. The formula of calculating mean for the negative binomial probability distribution is
a. q ⁄ p
b. P ⁄ Q
c. p ⁄ r
d. r ⁄ p
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Answer: (d).r ⁄ p