43. Six thousand light bulbs light a large hotel and casino marquee. Each bulb failscompletely at random, and each has an average lifetime of 3,280 hours. Assuming thatthe marquee stays lit continuously and bulbs that burn out are replaced immediately, howmany replacements must be made each year on the average?44. The owner of the hotel mentioned in Problem 43 has decided that in order to decreasethe number of burned-out bulbs, she will replace all 6,000 bulbs at the start of eachyear in addition to replacing the bulbs as they burn out. Comment on the effectivenessof this strategy.

Note: As per the guidelines for more than two question only one question has to be answered. Please…

Answered: 43. Six thousand light bulbs light a…

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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A research wants to determine if pre-natal exposure to the hormones in birth control pills alters the sex makeup of midshipman fish populations (which are typically half male and half female).Specifically, the researcher wishes to test the hypothesis that exposure to hormones will increase the number of females in the population.The researcher exposes a group of pregnant midshipman fish to birth control hormones and records the sex of the first 11 offspring birthed.They then observe that 1 are female.Use a sign test and a alpha of .05 to test the indicated hypothesis.What is the critical value?
Need help with the last one please!
A clinical test on humans of a new drug is normally done in three phases. Phase I is conducted with a relatively small number of healthy volunteers. For example, a phase I test of a specific drug involved only 88 subjects. Assume that we want to treat 88 healthy humans with this new drug and we have 1212 suitable volunteers available. Complete parts (a) through (c) below. a. If the subjects are selected and treated in sequence, so that the trial is discontinued if anyone displays adverse effects, how many different sequential arrangements are possible if 88 people are selected from the 1212 that are available? Choose the correct answer below. A. 19 comma 958 comma 40019,958,400 B. 40 comma 32040,320 C. 479 comma 001 comma 600479,001,600 D. 495495 b. If 88 subjects are selected from the 1212 that are available, and the 88 selected subjects are all treated at the same time, how many different treatment groups are possible? There are…
The manufacturer of a certain engine treatment claims that if you add their product to your engine, it will be protected from excessive wear. An infomercial claims that a woman drove 6 hours without oil, thanks to the engine treatment. A magazine tested engines in which they added the treatment to the motor oil, ran the engines, drained the oil, and then determined the time until the engines seized. Complete parts (a) and (b) below. ..... (a) Determine the null and alternative hypotheses that the magazine will test. Но: 6.
A radioactive isotope is released into the air as an industrial by-product. This isotope is not very stable due to radioactive decay. Two-thirds of the original radioactive material loses its radioactivity after each month. If 13 grams of this isotope are released into the atmosphere at the end of the first and every subsequent month and the situation goes on ad infinitum, how many grams of radioactive material are in the atmosphere at the end of each month in the long run?
11. There are 286.9 million drivers in the U.S. who drive a cumulative 3.2 trillion miles every year. There are 1.5 million car-wildlife collisions in the U.S. every year. If every driver in the United States bike to work one day a week, reducing their annual drivingmiles by 300, how many fewer wildlife collisions would there be?
Consider a service facility with four clerks. Clerk one works at rate 14/hour; Clerk two at rate 18/hour; Clerk three at rate 20/hour; and Clerk four at rate 16/hour. All service times are independent and exponential. If when you arrive there is already one person waiting, what is your expected waiting time?
Rework problem 22 from section 4.3 of your text, involving a carnival fishpond. Assume that the pond contains 120 fish: 109 blue, 10 orange, and 1 white. A contestant pays $0.60 to randomly catch one fish and receives $0.25 if the fish is blue, $1.00 if the fish is orange, and $13.00 if the fish is white. How much (on average) does the carnival gain on each play? (If the carnival looses money, enter a negative dollar amount)
Compute the following correct to the nearest whole number: a. If 7 out of 10 patients admitted to the hospital are discharged in 3 days or less, how many out of 13,554 recorded admissions exceeded a stay of 3 days? admissions b. A hospital discharged 3,520 patients in January. If 5% developed a hospital-based infection, how many were affected? patients c. A hospital reported 126,778 discharges during the past year. If 35% of these patients were seen in consultation, how many of the discharged patients were seen by a consultant? patients
Compute the following correct to the nearest whole number:a. If 6 out of 10 patients admitted to the hospital are discharged in 3 days or less, how many out of 12,689 recorded admissions exceeded a stay of 3 days? b. A hospital discharged 2,895 patients in January. If 3% developed a hospital-based infection, how many were affected? c. A hospital reported 14,444 discharges during the past year. If 35% of these patients were seen in consultation, how many of the discharged patients were seen by a consultant?
out nd TP Smes (C knowle ability c (PQuestion 2 California Instruments, Ic., produces 3,000 computer chips per day. Three hundred are tested for a period of (500 operating hours each. During the test, six failed: two after 50 hours, two at 100 hours, one at 300 hours, and one at 400 hours. Find failures per number tested and failures per operating time. If 300 of these chips are used in building a mainframe computer, how many failures of the computer can be expected per month? tion of er bility is a r rescribed Suppos- as i
You are interested in finding out if kangaroo rats that have been offered food ad lib(unlimited food) for the previous 24 hours store a different amount of food in their pouches than kangaroo rats that have been starved for 24 hours. You take 8 kangaroo rats and starve them for 24 hours, then offer them food and count how many seeds are stored in their pouches in the next hour. You let your rats rest for one week, and repeat the experiment with the same rats, but offer them unlimited food for the 24 hours prior to the experiment. Run the appropriate statistical test. Rat ID # Seeds (starving) 3 Seeds (ad lib) 1 10 26 2 16 23 3 15 16 4 12 17 5 21 29 6 13 21 7 12 32 8 10 18

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