Suppose that X is a normal random variable with mean 5. If P(X > 9) = 0.2 ,approximately what is Var(X)?
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- 1 A random variable X has a mean of 10 and variance of 9 and is of unknown distribution. Find p (5 < X < 15).Suppose X is a random variable of uniform distribution between 1 and 7. Find E(X)Q3/A/ Let X be a r.v with p.d.f f(x) = e-lkl - oSuppose X is a randomvariable of normal distribution with mean equal to -2 and standard deviation equal to 4. Find P(X>-2)The random variable x has a normal distribution with mean 50 and variance 9. Find the value of x, call it x0, such that: a) P(x ≤ xo) = 0.8413 b) P(x > xo) = 0.025 c) P(x > xo) = 0.95 d) P(41 ≤ x ≤ xo) = 0.8630X is distributed as a Normal random variable with mean of 100 and a standard deviation of 10 (i.e X~N(100,10). You take a random sample of 20 items from X and you calculate the average of this sample. What is the expected value of this sample average? (i.e. what value would you expect to get for the average of this small sample?SEE MORE QUESTIONS