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For each probability density function, over the given interval, find
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- Given the probability density function f (x)=1/2 over the interval [2,4] find the expected value, the mean, the variance and the standard deviation. Expected value: Mean: Variance: Standard Deviation:arrow_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_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_forward
- Given 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_forwardFor the probability density function, over the given interval, find E(x), E(x²), the mean, the variance, and the standard deviation. 1 f(x)=x, [0, 6] 18arrow_forwardWhich of the following tables shows a valid probability density function? Select all correct answers. Select all that apply: x P(X=x) 0 14 1 38 2 38 x P(X=x) 0 18 1 18 2 34 x P(X=x) 0 −310 1 110 2 15 3 1 x P(X=x) 0 0.74 1 0.0 2 0.54 x P(X=x) 0 110 1 15 2 35 x P(X=x) 0 0.18 1 0.76 2 0.0arrow_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_forwardSolve each problem on a separate sheet of paper. Show all necessary solutions. 1. Let X denotes the percentage of time out of a 40-hour workweek that a call center agent is directly serving a client by answering phone calls. Suppose that X has a probability density function defined by f(x) = 3r for 0 sxs 1. Find the mean and variance of X. Interpret the results. %3Darrow_forward
- Find the value of c, the expectation of X, and the variance of X.arrow_forwardThe length of life X, in days, of a heavily used electric motor has probability density function f(x) = {0, -3x S3e x20 %3D otherwise Find the probability that the motor has at least 1/2 of a day, given that it has lasted 1/4 of a day. Find the mean and the variance for X.arrow_forwardFind the mean and standard deviation of the specified probability density function. f(x) = for [12, 20] %3D O A. u=1.6, o = 2.29 O B. p= 15.5, o = 2.28 O C. u= 16, o = 2.31 O D. u= 15, o = 2.31 Click to select your answer. Type here to search 99- 近arrow_forward
- Glencoe Algebra 1, Student Edition, 9780079039897...AlgebraISBN:9780079039897Author:CarterPublisher:McGraw Hill