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For each probability density function, over the given interval, find
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- Find the mean, E[X], and variance, E[X²] – E[X], of a Uniform[a, b] random variable.arrow_forwardGiven the probability density function f(x) = over the interval [2, 7], find the expected value, the mean, 5 the variance and the standard deviation. Expected value: Mean: Variance: Standard Deviation: > Next Questionarrow_forwardShow full solution.According to rainfall data collected by a laboratory during storm events, the precipitation level in inches (X) varies jointly with runoff in cubic feet per second (Y). The joint probability mass function (PMF) of both variables are given by the following Table: Y 1 2 3 10 0.05 0.15 0 20 0.1 0.25 0.25 30 0 0.1 0.1 a. What is the probability that the next storm will bring a precipitation of 2 or more inches and a runoff of more than 20 cfs?b. After a storm, a precipitation of 2 inches is measured. What is the probability that the runoff in this storm is 20 cfs or more?c. Are X and Y statistically dependent? Substantiate your answer.arrow_forward
- Let X∼Uniform(0,1) distribution. Find the PDF of Y= 3√X and derive the expected value and the variance of Y.arrow_forwardGiven the probability density function f(x)=16f(x)=16 over the interval [2,8][2,8], find the expected value, the mean, the variance and the standard deviation.arrow_forward: 'Example 7-37. A random variable X assumes the value 1, 12, ... with probabilities U1, Uz ... respectively. Show that 1 u; e» (^;)* ; ^; > 0, Du; = 1 j=0 Pk k! =D0arrow_forward
- In the transmission of digital information, the probability that a bit has high, moderate, and low distortion is 0.01, 0.04, and 0.95, respectively. Suppose that three bits are transmitted and that the amount of distortion of each bit is assumed to be independent. Let X and Y denote the number of bits with high and moderate distortion out of the three, respectively. Determine: E(x) =arrow_forwardLet's say p a real function p by: 1 P(x) = 5e x ER a. Why is the function p a probability density? b. In the sequence, X is a random variable with probability density p. Calculate P(X 2 0) ? c. Calculate the expected value of X d. Calculate the variance of Xarrow_forwardIf the probability density function of the random variable X is eX, x>0, f(x)= 0, Otherwise. Then the variance of X is Select one: О a.2 O b.1 O c. -2 d. -1arrow_forward
- This was what WAS given please helpppparrow_forwardA random variable X has the probability function as given in the table to the right. It is easy to show that the mean value is 5. Find the variance of X. X P(X) 3 0.2 5 0.6 7 0.2arrow_forwardFind the variance of the following discrete probability distribution. Formula in the image attached Write and encircle your final answer: X P(X) -1 0.1 0 0.8 1 0.1arrow_forward
- Glencoe Algebra 1, Student Edition, 9780079039897...AlgebraISBN:9780079039897Author:CarterPublisher:McGraw Hill