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Which of the Following Is Not True for a Random a≤x≤ba \leq x \leq b

Question 29

Multiple Choice

Which of the following is not true for a random variable X that is uniformly distributed over the interval a≤x≤ba \leq x \leq b ?


A) E(X) = (a + b) /2.
B) V(X) = (b−a) 2( b - a ) ^ { 2 } /12.
C) σ\sigma = (b - a) /6.
D) f(x) =1/(b−a) f ( x ) = 1 / ( b - a ) if a ? x ? b.

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