3.43 Many utility companies promote energy conservation by offering discount rates to consumerswho keep their energy usage below certain established subsidy standards. A recent EPA reportnotes that 70% of the island residents of Puerto Rico have reduced their electricity usagesufficiently to qualify for discounted rates. If five residential subscribers are randomly selectedfrom San Juan, Puerto Rico, find the probability of each of the following events:a All five qualify for the favorable rates.b At least four qualify for the favorable rates.

Answered: Image /qna-images/answer/fd8734c8-ce8a-42be-b229-b1f484021de7.jpg

Answered: 3.43 Many utility companies promote…

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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e) Which drink was the most preferred and what is the probability of preferring that drink? 2. Consider the following return rates for items purchased: Retail return rates Shoppers return items bought online at a far higher rate Online purchases Return rates by category (both online and in-store) About 30% Auto parts 21% Housewares 12.3% Apparel 10.5% Footwear 9.6% Sporting goods 9.3% Beauty 5.2% Source: WSJ a) If Sally sells 27 pairs of shoes during the month, what is the probability Sally has exactly 4 pairs of shoes returned? b) What is the probability that Sally has less than4 pairs of those shoes returned? c) Tom works at Napa and sells auto parts. Tom sold 18 auto parts last week. What is the probability that Tom gets more than 4 of those parts returned? d) What is the probability that Tom between 2 and 5 of those parts returned?
3. In testing a certain kind of truck tire over rugged terrain, it is found that 25% of the trucks fail to complete the test run without a blowout. Of the next 16 trucks tested, find the probability that a. From 3 to 6 have blowouts, exclusive; b. Fewer than 4 have blowouts; c. More than 5 have blowouts.
11 A Gallup Poll of U.S. adults indicated that Kentucky is the state with the highest percentage of smokers. Consider the following example data from the Tri-State region, an area that comprises northern Kentucky, southeastern Indiana, and southwestern Ohio.State Smoker Non-SmokerKentucky 47 176Indiana 32 134Ohio 39 182Total 118 492 a Use the data to compute the probability that an adult is the Tri-State region smokes b What is the probability of an adult in each state of the Tri-State region being a smoker? Which state in the Tri-state region has the lowest probability of an adult being a smoker? Show all steps in Excel.
A police officer randomly selected 586 police records of larceny thefts. The accompanying data represent the number of offenses for various types of larceny thefts. (a) Construct a probability model for type of larceny theft. (b) Are coin-operated machine larcenies unusual? (c) Are larcenies from buildings unusual? (a) Complete the table below. Type of Larceny Theft Pocket picking Purse snatching Shoplifting From motor vehicles Motor vehicle accessories Probability Bicycles From buildings From coin-operated machines (Round to three decimal places as needed.) (b) Choose the correct answer below. Data table Type of Larceny Theft Pocket picking Purse snatching Shoplifting From motor vehicles Motor vehicle accessories Bicycles From buildings From coin-operated machines Print OA. Yes, because P(coin-operated machine) 0.05. OC. Yes, because P(larcenies from buildings) <0.5. O D. No, because the probability of an unusual event is 0. Number of Offenses 7 8 126 202 82 50 102 9 Done - X
When purchasing bulk orders of batteries, a toy manufacturer uses this acceptance sampling plan: Randomly select and test 48 batteries and determine whether each is within specifications. The entire shipment is accepted if at most 3 batteries do not meet specifications. A shipment contains 7000 batteries, and 3% of them do not meet specifications. What is the probability that this whole shipment will be accepted? Will almost all such shipments be accepted, or will many be rejected? The probability that this whole shipment will be accepted is (Round to four decimal places as needed.)
Each month a brokerage house studies various companies and rates each company's stock as being either "low risk" or "moderate to high risk." In a recent report, the brokerage house summarized its findings about 18 aerospace companies and 55 food retailers in the following table: Company Type Aerospace company Food retailer Low Risk 10 25 Probability If we randomly select one of the total of 73 companies W (a) Find the probability that the company's stock is moderate to high risk given that the firm is an aerospace company. (Round your answer to 4 decimal places.) Moderate to High Risk 8 30 0.4444
Based on a study by Dr. P. Sorita at Indiana University, assume the eye colors in the United States are distributed as follows: 40% brown, 35% blue, 12% green, 7% gray, 6% hazel a. If one person is randomly selected, what is the probability that this person will have brown or blue eyes? b. If two people are randomly selected, what is the probability that at least one of them has brown eyes?
Blue Embrold.. Pointehaven 200 G. PANDOR A study was conducted to determine whether there were significant differences between medical students admitted through special programs (such as retention incentve and guaranteed placement programs) and medical students admitted through the regular admissions criteria. It was found that the graduation rate was 91.9% for the medical students admitted through special programs. A sample of 11 students from the special programs are randomly selected. An event is considered unusual if it has a probability of less than 5%. Round to at least 4 decimal places! a) Compute the probability that at least 10 of them graduated. b) Compute the probability that exactly 8 of them graduated. C) Would it be unusual to randomly select 11 students from the special programs and get exactly 8 that graduate? O no, it is not unusual O yes, it is unusual d) Compute the probability that at most 8 of them graduated. e) Would it be unusual to randomly select 11 students…
Samples of emissions from three suppliers are classified for conformance to air-quality specifications. The results are summarized as follows: Conforms to air-quality YES NO A 29 13 Supplier B 24 10 31 7 What is the probability of an emission conforms to air-quality and Supplied from B?

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