There are 48 students in an elementary statistics class. On the basis of years of experience, the instructor knows that the timeneeded to grade a randomly chosen first examination paper is a random variable with an expected value of 5 min and a standarddeviation of 4 min. (Round your answers to four decimal places.)n USE SALT(a) If grading times are independent and the instructor begins grading at 6:50 P.M. and grades continuously, what is the(approximate) probability that he is through grading before the 11:00 P.M. TV news begins?(b) If the sports report begins at 11:10, what is the probability that he misses part of the report if he waits until grading isdone before turning on the TV?You may need to use the appropriate table in the Appendix of Tables to answer this question.Need Help?Watch ItRead It

Given. There are 48 students in an elementary statistics class. On the basis of years of experience,…

Answered: ded to grade a randomly chosen first…

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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In Hawaii, the rate of motor vehicle theft is 860 thefts per 100,000 vehicles. A large parking structure in Honolulu has issued 589 parking permits. (a) What is the probability that none of the vehicles with a permit will eventually be stolen? (Round λ to 1 decimal place. Use 4 decimal places for your answer.) (b) What is the probability that at least one of the vehicles with a permit will eventually be stolen? (Use 4 decimal places.) (c) What is the probability that four or more vehicles with a permit will eventually be stolen? (Use 4 decimal places.)
After 8:00pm on any Thursday, the amount of time a person spends waiting in line to get into a well-known pub is a random variable represented by X. Suppose we can model the behavior of X with the Exponential probability distribution with a mean of waiting time of 37 minutes. (a) Provide the value of the standard deviation of this distribution. Enter your answer to two decimals. ox= minutes (b) Suppose you are in line to get into the pub. Compute the probability that you will have to wait between 28 and 38 minutes to get in. Answer with four decimals. P(28 < X <38) = (c) It has been 30 minutes since you entered the lineup to get into the pub, and you are still waiting. What is the chance that you will have waited at most 56 minutes, in total? Use four decimals in your answer. P(wait in total at most 56 minutes) = (d) 40% of the time, you will wait at most how many minutes to get into this pub? Enter your answer to two- decimals. minutes
Next Question A study reports that 36% of companies in Country A have three or more female board directors. Suppose you select a random sample of 10d plete parts (a) through (c) below. ..... a. What is the probability that the sample will have between 32% and 43% of companies in Country A that have three or more female board directors? The probability is .7246 . (Round to four decimal places as needed.) b. The probability is 60% that the sample percentage of Country A companies having three or more female board directors will be contained within what symmetrical limits of the population percentage? The probability is 60% that the sample percentage will be contained above 32 % and below 40 %. (Round to one decimal place as needed.) c. The probability is 99.7% that the sample percentage of Country A companies having three or more female board directors will be contained within what symmetrical limits of the population percentage? The probability is 99.7% that the sample percentage will…
Samuel F.B. Morse (1791 – 1872), the creator of Morse Code, claimed that 12% of all letters used in the English language were “e”s. Suppose random samples of 196 letters are selected from a book What is the probability that a random sample of 196 letters will contain at least 10% "e"s? Type your calculated z-score here. Express its value to the nearest hundredth (two decimal places). Type your probability here. Express its value to four decimal places. Do not round.
Based on historical data, your manager believes that 40% of the company's orders come from first- time customers. A random sample of 223 orders will be used to estimate the proportion of first- time-customers. What is the probability that the sample proportion is between 0.24 and 0.43? Note: You should carefully round any z-values you calculate to 4 decimal places to match wamap's approach and calculations. Answer = (Enter your answer as a number accurate to 4 decimal places.) Question Help: Message instructor Submit Question 80 888 F2 F3 F4 F5 F6 F7 F8 @ $ & 2 8. < CO # 3
One environmental group did a study of recycling habits in a California community. It found that 75% of the aluminum cans sold in the area were recycled. (Use the normal approximation. Round your answers to four decimal places.) (a) If 389 cans are sold today, what is the probability that 300 or more will be recycled? (b) Of the 389 cans sold, what is the probability that between 260 and 300 will be recycled Please help- I have been working on this for two days!
Based on historical data, your manager believes that 41% of the company's orders come from first- time customers. A random sample of 84 orders will be used to estimate the proportion of first-time- customers. What is the probability that the sample proportion is between 0.33 and 0.48? Note: You should carefully round any z-values you calculate to 4 decimal places to match wamap's approach and calculations. Answer = (Enter your answer as a number accurate to 4 decimal places.) Question Help: Message instructor Submit Question DI 80 88 F9 F6 F7 F8 F3 F4 F5 @ # $ & 3 4 6. 7 8. W R Y S D G H J V
Hi, I need help with this question and I don't know what to do. Please help me.
The following data summarizes results from 891 pedestrian deaths that were caused by accidents. If one of the pedestrian deaths is randomly selected, find the probability that the pedestrian was intoxicated or the driver was not intoxicated. Pedestrian Intoxicated? Yes No Driver intoxicated? Yes 95 69 No 222 505 P(pedestrian was intoxicated or driver was not intoxicated) = (Do not round until the final answer. Then round to three decimal places as needed.)
New spark plugs have just been installed in a small airplane with a two-cylinder engine. For each spark plug, the probability that it is defective and will fail during its first 20 minutes of flight is 1/1,000, independent of the other spark plugs.(a) What is the probability that none of the two spark plugs will fail during the first 20 minutes of flight? (Round your answer to four decimal places.)(b) What is the probability that at least one of the spark plugs will fail? (Round your answer to four decimal places.)
In Hawaii, the rate of motor vehicle theft is 520 thefts per 100,000 vehicles. A large parking structure in Honolulu has issued 568 parking permits. (a) What is the probability that none of the vehicles with a permit will eventually be stolen? (Round λ to 1 decimal place. Use 4 decimal places for your answer.)
Based on historical data, your manager believes that 43% of the company's orders come from first- time customers. A random sample of 90 orders will be used to estimate the proportion of first-time- customers. What is the probability that the sample proportion is between 0.3 and 0.44? Note: You should carefully round any z-values you calculate to 4 decimal places to match wamap's approach and calculations. Answer = (Enter your answer as a number accurate to 4 decimal places.) Question Help: Message instructor Submit Question Previous 80 888 F3 F4 F5 F6 F7 F8 F9 $ & 2 4 6. 7 8. W E Y U J K この # 3

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