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B.Sc.II
Probability Distribution II
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1. If X follows U(a,b) then mean of X is
2 points
(a+b)/2
(b-a)/2
(a+b)/12
(b-a)/12
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2. F distribution is invented by _______
2 points
R.A.Fisher
W.S, Gosset
G.W.Snedecor
None of these
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3.Chi square distribution is a particular case of _________ distribution
2 points
Gamma
Normal
Exponentail
Beta
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4. t - distribution is
2 points
symmetric
positively skewed
negatively skewed
none of these
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5. Suppose X & Y are independent standard normal variates, probability distribution of X - Y is
2 points
N(0,1)
N(1,0)
N(1,1)
N(0,2)
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6. Let X be exponential variate with parameter A then C.V. for X is
2 points
A
1/A
100
1/100
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7. If X follows N(0,1) and Y=2X+3 Var(Y) =
2 points
4
2
6
8
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8. If X follows exponential distribution then which of the following statements is true.
2 points
mean = variance
mean=standard deviation
mean < variance
Mean < standard deviation
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9.Which of the following is symmetric distribution?
2 points
Normal
Uniform
Exponential
Chi square
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10. Mean of Chi square distribution is_____
2 points
2n
n
n-1
n+1
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