Suppose that the random variable X has a lognormal distribution with parameter values 1 2 and 1 5 Find (a) E(X) (b) Var(X) (c) The upper quartile of X (d) The lower quartile of X (e) The interquartile range (f) P(5 X 8)

Question: Suppose that the random variable X has a lognormal distribution with parameter values = 1.2 and = 1.5. Find: (a) E(X) (b) Var(X)

Suppose that the random variable X has a lognormal with parameter values μ = 1.2 and σ = 1.5. Find:
(a) E(X)
(b) Var(X)
(c) The upper quartile of X
(d) The lower quartile of X
(e) The interquartile range
(f) P(5 ≤ X ≤ 8)

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