4.The checkout time of a supermarket cashier follows an exponential distribu-tion, and the mean checkout time is three minutes.(a)What is the probability that a checkout time exceeds 2 minutes?If 10 of these checkout times are selected, what is the probability that(b)at most 3 checkout times that is less than 2 minutes?

Answered: Image /qna-images/answer/cdfee1f5-2842-43ea-9dac-482945d79dbf.jpg

Answered: 4. The checkout time of a supermarket…

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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Suppose that on the average, 3 students enrolled in a small liberal arts college have their automobiles stolen during the semester. What is the probability that less than 1 student will have his automobile stolen during the current semester? Round your answer to four decimal places.
Suppose we are flipping an unfair coin until we get a head with the probability of obtaining a tail at 75%. What is the probability of obtaining a head on the third flip? Report your answer as a decimal and round to the nearest thousandth.
6. On the average, it takes 25 seconds to download a file from the internet. If it takes an exponential amount of time to download one file, then what is the probability that it will take more than 70 seconds to download 3 independent files?
Suppose the average tread-life of a certain brand of tire is 45,000 miles and that this mileage follows the exponential probability distribution. What is the probability that a randomly selected tire will have a tread-life between 30,000 and 50,000 miles?
Suppose that the probability that any stock increases in price (over a 3 month period of time) is 60%. What is the probability that in a sample of 145 stocks that you buy that less than 55% increase in price (over a 3 month period of time)? (please round your answer to 4 decimal places)
Nissa is randomly pulling the medical records of a hospital's patients and collecting the records of those who have multiple stays at this hospital. Assume that 27% of all patients who have ever stayed at this hospital have multiple stays. What is the probability that the first multiple stays patient record that Nissa comes across is the fourth one she pulls? Use a TI-83, TI-83 Plus, or TI-84 calculator to find the probability. • Round your answer to three decimal places.
9. The CDC estimates that a non-infected person has a 10% chance of contracting mumps from an infected person from even a brief encounter. What is the probability that a non-infected person contracts mumps after 5 brief encounters with infected people?
Ashley’s Internet service is terribly unreliable. In fact, on any given day, there is a 75% chance that her Internet connection will be lost at some point that day. What is the probability that her Internet service is not broken for five days in a row? Enter a fraction or round your answer to 4 decimal places, if necessary.
Ashley’s Internet service is terribly unreliable. In fact, on any given day, there is a 60% chance that her Internet connection will be lost at some point that day. What is the probability that her Internet service is not broken for seven days in a row? Enter a fraction or round your answer to 4 decimal places, if necessary.
Suppose that 17% of people own dogs. If you pick two people at random, what is the probability that they both own a dog?Give your answer as a decimal (to at least 3 places) or fractionIs it correct answer 0.029?
On average, 128 storm events were observed annually in the city of Stormheaven, KS. The average storm duration was 2 hours. Compute the probability (%) that an interevent waiting time is longer than 5 days. Probability (%) must be answered as an integer without unit (just an integer number like 77 or 99).
If the probability of an event not occurring is 0.55, what is the probability the event will occur? If necessary, round to 4 decimal places.

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