Testing for a disease can be made more efficient by combining samples. If the samples from five people are combined and the mixture tests negative, then all five samples are negative. On the other hand, one positivesample will always test positive, no matter how many negative samples it is mixed with. Assuming the probability of a single sample testing positive is 0.1, find the probability of a positive result for five samplescombined into one mixture. Is the probability low enough so that further testing of the individual samples is rarely necessary?.....The probability of a positive test result is(Round to three decimal places as needed.)Is the probability low enough so that further testing of the individual samples is rarely necessary?A. The probability is not low, so further testing will not be necessary for any of the mixtures.B. The probability is low, so further testing of the individual samples will be a rarely necessary event.OC. The probability is not low, so further testing of the individual samples will frequently be a necessary event.O D. The probability is low, so further testing will be necessary for all of the combined mixtures.NextMacBookDIIDDF12F11000000F10吕0F7F8F9F5F6escF2F3F4F1&@$dele4567812{PQWERTYU11K# 3

Answered: ample will always test positive, no…

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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Physicians at a clinic gave what they thought were drugs to 950 asthma, ulcer, and herpes patients. Although the doctors later learned that the drugs were really placebos, 56% of the patients reported an improved condition. Assume that if the placebo is ineffective, the probability of a patients condition improving is 0.51 For the hypotheses that the proportion of improving is 0.5 against that it is >0.51, find the p-value. p=
The life of light bulbs is distributed normally. The variance of the lifetime is 900 and the mean lifetime of a bulb is 550 hours. Find the probability of a bulb lasting for at least 583 hours. Round your answer to four decimal places
The cost of 5 gallons of ice cream has a variance of 36 with a mean of 35 dollars during the summer. What is the probability that the sample mean would be less than 33.8 dollars if a sample of 96 5-gallon pails is randomly selected? Round your answer to four decimal places.
A poll found that 59% of a sample of 1020 teens in a certain large country go online several times a day. (Treat this sample as a simple random sample.) Complete parts a through e below. Find the margin of error for this poll if we want 90% confidence in our estimate of the percent of teens in the country who go online several times a day. Explain what the margin of error means. If instead we need to be 95% confident, will the margin of error be larger or smaller? Explain. Find that margin of error.
A catering service got hired to run the bar at a wedding with 100 guests. A wedding guest drinks on average 4 pints with variance of 0.9. i. Calculate how many pints the catering service approximately has to have in stock to be 95% sure that they can serve the demand. ii. To be on the safe side the catering service decides to bring 430 pints. What is the approximate probability that those will suffice?
Please make a possible answer
You want to find the probability that people will return a shopping cart to the corral after loading the groceries in their vehicle. For a 4 hours period, you observe the number of people who returned their cart and the number who did not. A success in this case would be that the person returned their cart. Choose the best statistical tool to calculate this probability A. Use the Central Limit Theorem to find the probability that the sample mean exceeds a certain value B. Use the empirical rule to find the number of cars that bracket 68% of the data C. Calculate a confidence interval for the population mean D. Calculate the total number of successes divided by the total number of observations to find the observed probability
A farmer only grows apple and orange trees in his orchard. 40% of his trees are apple trees. He is concerned that a parasite may be infecting his trees. The probability of the parasite infecting a given apple tree is 5% and the probability of the parasite infecting a given orange tree is 3%. Please give your answers to 3 decimal places, for example 0.305. a) What proportion of his trees are infected by the parasite? Your answer is 1 b) If a given tree is not infected, what is the probability that this tree was an apple tree? Your answer is
Please help me with the following question.
A different student studied a little and can make an educated guess on all 20 questions, improving his odds of guessing it correctly up to 0.50. What are the odds that this second student gets a failing grade? That is: he gets less than 12 questions correct out of the 20 questions?
The time it takes me to wash the dishes is uniformly distributed between 12 minutes and 22 minutes.What is the probability that washing dishes tonight will take me between 19 and 21 minutes?Give your answer accurate to two decimal places.
Please answer all sub-parts For a population with ? = 215 and ? = 30, what is the probability that a random sample of size 225 will have a sample mean (x bar) higher than 218?

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