An opinion poll asks a sample of 200 adults (an SRS) whether they favorgiving parents of school-age children vouchers that can be exchanged foreducation at any public or private school of their choice and 45% favoredthis idea. Each school would be paid by the government on the basis ofhow many vouchers it collected. Suppose that in fact 52% of thepopulation favor this idea. What is the probability less than 45% favor theidea?

Let p be the population proportion n=number of sample p=52%, n=200 Note: this probability value…

Answered: An opinion poll asks a sample of 200…

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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80% of U.S. drivers over the age of 30 have had a speeding ticket and 55% of those have also been in an accident while behind the wheel. What is the probability that a randomly selected US driver over the age of 30 has had a speeding ticket and also been in an accident while behind the wheel?
It is common knowledge that a fair coin lands heads up 50% of the time and tails up 50% of the time. For fair coins, a probability of 0 is assigned to the coin landing on its edge. But what if several coins were glued together? A teacher claims that if 10 pennies were glued together and flipped many times, the penny stack would land on heads 25% of the time, on tails 25% of the time, and on its edge 50% of the time. To investigate this claim, a student glues 10 pennies together and flips the stack 200 times. The student finds that the stack lands on heads 42 times, tails 41 times, and its edge 117 times. The student would like to know if there is convincing evidence that the distribution differs from what the teacher claimed. What is the value of the chi-square test statistic and P-value? Find the chi-square table here. χ2 = 5.79, P-value is between 0.05 and 0.10 χ2 = 5.79, P-value is between 0.10 and 0.15 χ2 = 5.97, P-value is between 0.025 and 0.05 χ2 = 5.97, P-value is between…
According to a recent article on the website www.fivethirtyeight.com, 30% of Americanssay they’re trying to reduce or eliminate gluten in their diets. Suppose you have 50volunteers and are interested in the number of them that are trying to reduce oreliminate gluten in their diets.a.) Find the probability that exactly 20 of the volunteers are trying to reduce oreliminate gluten in their diets. Use the formula.b.) Find the probability that 15 or fewer of the volunteers are trying to reduce oreliminate gluten in their diets. Use the calculator.c.) Find the probability that at least 27 of the volunteers are trying to reduce oreliminate gluten in their diets. Use the calculator.
Bryan is performing data entry for an insurance company by taking handwritten records and entering them into the database. Thus far, 15.6% of the handwritten records have had missing data that prevented them from being entered into the database. If Bryan takes 10 handwritten records, what is the probability that at most three records will be incomplete?
67.9% of all patients admitted to the intensive care unit (ICU) have a fever, 35.6% have some sort of infection, and 17.2 % have both problems. find the probability that a randomly chosen patient in this ICU had with a fever , given that they have an infection
A poll is given, showing 30% are in favor of a new building project. If 10 people are chosen at random, what is the probability that fewer than 7 of them favor the new building project?
Suppose 50% of the students in school have a part time job. Among those who have a partime job, 20% of them need to work at least 20 hours per week. If you randomly select a student in school, what’s the probability that the student does not work or works less than 20 hours per week?
Just before a city referendum on a school budget, a local newspaper polls 450 voters in an attempt to predict whether the budget will pass. Suppose that, unknown to everyone, the budget actually has the support of 52% of the voters. What is the probability the newspaper's sample will lead the newspaper to predict defeat of the referendum, that is, what is the probability that the newspaper's sample results in a sample proportion p̂ less than 0.50 in favor of the referendum?
Suppose that historically, 35% of applicants that are offered admittance to Texas Tech actually enroll, while the others take offers somewhere else. If Texas Tech will accept 9000 this coming year, what is the probability that less than 34.1654% will actually enroll?
In 2014, the percentage of the U.S. population that speak English only in the home is 78.9%. Choose 15 U.S. people at random. What is the probability that exactly one-third of them speak English only? At least one-third? What is the probability that at least 9 do not speak English in the home?
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