5. Let the random variable X be the number of days that a certain patient needs to be in thehospital. Suppose X has the pmf f(x) = 5x, , x = 1,2,3,4. If the patient is to receive $200 from10an insurance company for each of the first two days in the hospital and $100 for each day afterthe first two days, what is the expected payment for the hospitalization?

Let x be the number of days that a patient needs to be in the hospital.Its PMF is given byConsider…

Answered: 5. Let the random variable X be the…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Many people believe that the daily change in price of a company's stock in the stock market is a random variable with mean 0 and variance o² during the middle 2 months between 2 earning report dates when there is not much news released. That is, if Yn represents the closing price of the stock on the nth trading day of that period, then Yn = Yn-1+Xn, for 1 ≤ n ≤ 60, where X₁, X2,..., X60 are independent and identically distributed random variables with mean 0 and variance o². Suppose that the stock price at the beginning of the 2-month period is 100. If o = 2, what is the approximate probability that the stock's closing price on the 30th trading day will exceed 110, i.e., what is P(Y30 > 110)
4. Suppose that the random variable X has p.d.f. f(x) = { 1- |x – 1|, if 0 0.5. (c) Find the mean and variance of the random variable X.
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4. In professor Shankar's quiz, the time taken to complete the quiz is a random variable with a pdf £x (x) = 20 = exp(-26 ) ₁ x 20² 20 1₂x ≥0 What is the average time for completion? If there are 50 students in the class, what is the probability that at least 20 of them will complete the quiz in less than the average? What is the probability that exactly 35 students complete within the average time.
Find the probability for P(y < 0 or y > 3) if y is distributed as N(1, 9)
4. The battery life of a fully charge iPhone 13 Pro on a standby follows a normally distributed with mean 7 hour and variance o² fl = 1 hours. = (a) Write out the integral form of the probability that a fully-charged iPhone 13 Pro last between 7 and 9 hours on standby. then use the pnorm function in R to find this probability. (b) What is the probability that a fully-charged iPhone 13 Pro last less than 5 hours? (c) What is the probability that a fully-charged iPhone 13 Pro last more than 9 hours? (d) What is the minimum time a fully-charged iPhone 13 Pro need to last in order to be in the top 10% best quality?
What is the probability that the total of two randomly chosen numbers exceeds 3, where the first number is chosen from a uniform distribution between 0 and 2, and the second number is selected from an exponential distribution with a mean of 1?
Find the first two moments about the mean for the random variable X defined by X = -2 with prob. 1/3 3 with prob. 1/2 = 1 with prob. 1/6. %3D
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