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1) The mean and variance of the binomial variate X are 8 and 4 respectively. Find P(X < 3)
2) Let X a continuous random variable define: f(x)= {ax 0≤ X ≤3 { 0 otherwise
Find the value of the constant (a), p (X≥1), p (2≤ X ≤4), E(X), standard déviation
3) Let X a continuous random variable define: f(x) = {1/6 0≤ X ≤ k {0 otherwise
1- draw the probability function 2- Find the value of the constant (k), p (X≥2), p ( 0.5 ≤ X ≤5), μ, standard déviation
Sagot :
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