.) The probability density function of the random variable X is given by: for x > 0 otherwise. f(x) = For what value of c is this a legit density function? Find the value for c, then calculate P(X> 2).

Suppose that a random variable X has the following probability density function. SC(36-x²) 0 ≤ x ≤ 6 otherwise f(x) = {C (² Find the expected value of X. (You will need to find the value of the constant C so that f is a pdf.)

This is Involving drawing markers from a box of markers with ink and markers without ink. Assume that the box contains 17 markers: 14 that contain ink and 3 that do not contain ink. A sample of 4 markers is selected and a random variable Y is defined as the number of markers selected which do not have ink. Fill in the table below to complete the probability density function. Be certain to list the values of Y in ascending order.

For the probability density function f defined on the random variable x, find (a) the mean of x, (b) the standard deviation of x, and (c) the probability that the random variable x is within one standard deviation of the mean. 1 f(x) = x, [5,9] 28 a) Find the mean. %3D (Round to three decimal places as needed.) b) Find the standard deviation. (Round to three decimal places as needed.) c) Find the probability that the random variable x is within one standard deviation of the mean. The probability is. (Round to three decimal places as needed.)