26.  The formula of mean of uniform or rectangular distribution is as 
a.  mean = 4(b + a) ⁄ 2b 
b.  mean = (b + a) ⁄ 2 
c.  mean = (b  2a) ⁄ 4 
d.  mean = (2a + 2b) ⁄ 2a 
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Answer: (b).mean = (b + a) ⁄ 2

27.  The normal distribution is also classified as 
a.  Gaussian distribution 
b.  Poisson distribution 
c.  Bernoulli's distribution 
d.  weighted average distribution 
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Answer: (a).Gaussian distribution

28.  The probability which explains x is equal to or less than particular value is classified as 
a.  discrete probability 
b.  cumulative probability 
c.  marginal probability 
d.  continuous probability 
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Answer: (b).cumulative probability

29.  If the sample size is 6 and the population is 50 from which it is drawn without replacement and the elements for success are 22 then the variance of hyper geometric probability distribution is 
a.  1.388 
b.  2.388 
c.  3.388 
d.  4.388 
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Answer: (a).1.388

30.  The types of probability distributions by taking their functions of considerations must include 
a.  posterior probability distribution 
b.  discrete probability distribution 
c.  continuous probability distribution 
d.  both b and c 
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Answer: (d).both b and c
