Instruction: Random Variables and Probabilities (Engineering Data Analysis) 1. Given the joint density function below, solve for the following: 2x, 4y +,0
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- Determine the value of c that makes the function f(x,y)=c(x + y) a joint probability density function over the range 0<x<3 and x<y<x+2. Use the Scientific Method of Answering (Given, Required, Formula and Solution).part a) Write down the joint probability density function fX,Y(x,y) of X and Y on its support.part b) Which values of the constants A, B, C, D, E are correctA random variable X has probability density function (pdf) fx(x), wherefx(x) =and k is a constant. Find:i. kii. P [ X > 1]iii. the mean of X
- The cumulative density function of a random variable X is FX(x) = 1 − eλx^μ (see picture), for x ≥ 0 and λ, μ > 0. What is the form of the random variable’s probability density function?The PDF of the two independent random variables X and Y are shown in the image below. Suppose Z=X+Y. Determine the probability density value at z=0, fZ(0). (The answer is not 1/4.)The joint density function of X and Y is given by f(x, y) = xe-(x+y) x > 0, y > 0 0 otherwise What is P(x < 1, y < 1)? Question 20 options: a 2e-2 b -e-1 c e-1 d -2e-2
- A random variable X has the density function: f(x)= K.1/(1+x2), ?? − ∞ < x < ∞ . Determine K and the c.d.f. associated with. Evaluate the probability P(X≥ 0). Find also the mean and variance of X.The probability density function of the random variable X is as in the photo. a) Mx(t)=E(etx)=? (Find the moment generating function of the random variable X.) b) Find the expected value and variance of the random variable X by using the moment subtracting function. NOTE: Solve the question under the condition t<1 while solving option a.A random variable X has the probability density function defined by f(x) = kx, 0 ≤ x ≤ 2. a. Find P(X>1). b. What is the probability density function of Y = 8X2? c. What is the expected value of Y?
- The resistance X? of an electrical component has a probability density function f(x)= A(x−1.5) for resistance value in the range 2≤y≤3 3. (i) Calculate the value of constant A? ii)Calculate the cumulative distribution function and sketch it. iii)The probability that electrical component has a resistance between 2 to m? is 0.5. Find the value of m?The probability density function of the length of a hinge for fastening a door is f(x) = 1.25 for 74.6 < x < 75.4 millimeters. If the specifications for this process are from 74.7 to 75.3 millimeters, what proportion of hinges meets specifications? REMINDER: Answer must be a fraction in lowest term.Measurements of scientific systems are always subject to variation, some more than others.There are many structures for measurement error, and statisticians spend a great deal of timemodelling these errors. Suppose the measurement error X of a certain physical quantity isdecided by the density function?(?) = {?(3 − ?2) −1 < ? < 10 ?????ℎ???i) Determine k that renders f(x) a valid density function.ii) Find the probability that a random error in measurement is more than 0.3.