E-PolyLearning

31. Consider the probability distribution as standard normal, if the value of μ is 75, the value of x is 120 with the unknown standard deviation of distribution then the value of z-statistic
a. will be one
b. will be zero
c. will be negative
d. will be positive
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Answer: (d).will be positive

32. If the value of p is 0.60 and value of n is 3 whereas the random variable x is equal to 4 then the value of z-score of distribution is
a. 1.59
b. 2.59
c. 2.68
d. 0.59
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Answer: (b).2.59

33. For a rectangular or uniform distribution, the value of interval a is 7 and the value of interval b is 8 then the value of mean for the distribution is
a. 1.33
b. 3.33
c. 2.33
d. 4.33
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Answer: (d).4.33

34. The condition for negative exponential distribution considering mean (μ) is that
a. μ must be less than zero
b. μ must be greater than one
c. μ must be greater than zero
d. μ must be smaller than twp
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Answer: (c).μ must be greater than zero

35. If the mean of binomial probability distribution is 25 then the mean of Poisson probability distribution is
a. 70
b. 50
c. 25
d. 50
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Answer: (c).25