please can someone answer them
4/ 19/2021 Your Account Log Out Site Search... Your Cart MathLynx LIBRARY STUDENTS INSTRUCTORS ABOUT US CONTACT Home >> Collaborative Statistics > Continuous Random Variables > Evaluation Tools Evaluation: Chapter Five Cumulative Date2021-04-19 15:24:43 Collapse All) Problem 1 A subway train on the F line arrives every two minutes. We are interested in the length of time a commuter must wait for a train to arrive. The time follows a uniform distribution. In each appropriate box you are to enter either a rational number in "p/q" format or a decimal value accurate to the nearest 0.01 a. The waiting time is modeled by a random variable X with X ~ (pick one) v distribution. b. The density function for X is given by f(x) = , with
40) = d. The mean My = Problem 2 Score: 0.00 s://www.mathlynx.com/online/collab_stat_cont_eval_cum?mode=review &evalid=205847Click here for the solution Problem 3 The time (in years) after reaching age sixty that it takes an individual to retire is approximately exponentially distributed with a mean of about nine years. Suppose we randomly pick one retired individual. We are interested in the time after age sixty to retirement. In each appropriate box you are to enter either a rational number in "p/q" format or a decimal value accurate to the nearest 0.01 a. The time after sixty to retirement is modeled by a random variable X with X ~ (pick one) distribution. Incorrect. Score: 0.00 Collapse All b. The mean of X is MX = Incorrect. Score: 0.00 c. The standard deviation of X is ox = Incorrect. Score: 0.00 d. Probability that individual retired after 75 is P(X > 15) = Incorrect. Score: 0.00 . Do more people retire before 69 or after 69 ? (pick one) Incorrect. Score: 0.00 Problem 3 Score: 0.00 Click here for the solution Problem 4 Suppose that the useful life of a car battery, measured in months, decays with parameter 0.02 . We are interested in the life of the battery. In each appropriate box you are to enter either a rational number in "p/q" format or a decimal value accurate to the nearest 0.01 . a. The life of the battery is modeled by a random variable X with X ~ (pick one) distribution. Incorrect. Score: 0.00 b. The mean of X is MX = Incorrect. Score: 0.00 c. The standard deviation of X is ox = Incorrect. Score: 0.00 d. On average, how long would you expect one battery to last? E[X] = Incorrect. Score: 0.00 s://www.mathlynx.com/online/collab_stat_cont_eval_cum?mode=review&evalid=205847 2/3Evaluation: Chapter Five Cumulative | MathLynx Online Mathematics e. On average, given 6 batteries and replacing each at the end of its life with the next, how long would you expect the 6 batteries to last? E[6 . X] = Incorrect. Score: 0.00 Problem 4 Score: 0.00 Click here for the solution SUBMIT Collapse All Total score: 0.00 Jation Tools up Normal Distributions . Printer-friendly version
