You are the manager of a grocery store. Lately, customers have beencomplaining about the eggs they purchase being bad. You know yourfridges work properly, so you suspect it is the supplier's fault. When thenext egg shipment comes in, you grab an empty carton and randomly select12 eggs from the shipment. You crack them open and find 9 good eggs and 3bad eggs. With a 95% confidence level, what percentage of the eggs are goodin this shipment?O 75% +/- 2.8%75%75% +/- 27%75% +/- 2.7%75% +/- 28%

Answered: Image /qna-images/answer/291e576b-30f9-4892-8066-d081d48e5a8a.jpg

Answered: You are the manager of a grocery store.…

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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You and a friend are interested in knowing if two groups have the same proportion of smokers. The first group of n = 500 consist of 490 smokers. The second group of n = 500 has 400 smokers. The overall proportion of smokers in both groups is .89 (89%). You want to know whether the proportions of smokers are the same in the two groups of individuals. Based on a 95% confidence level, after hypothesis testing, what would you tell your friend? Would the null hypothesis reject H0 or fail to reject H0?
A political candidate has asked you to conduct a poll to determine what percentage of people support her. If the candidate only wants a 6% margin of error at a 95% confidence level, what size of sample is needed?
A crossover trail is a type of experiment used to compare two drugs. Subjects take one drug for a period of time, then switch to the other. The responses of the subjects are then compared using matched pair methods. In an experiment to compare two pain relievers, seven subjects took one pain reliever for two weeks, then switched to the other. They rated their pain level from 1 to 10, with larger numbers representing higher levels of pain. The results are listed below. Can you conclude that the mean pain level is more with drug B? Use the 0.05 level and the p- values method.
Students at a certain college were asked if they have a car. After surveying 601 students, it was found that 40.3% of them have a car. The margin of error was 4% with a 95% confidence level. What does this margin of error tell you about the percentage of students at that college who have a car? We can be 95% confident that somewhere between % and % of the students at that college have a car.
A political candidate has asked you to conduct a poll to determine what percentage of people support him. If the candidate only wants a 2% margin of error at a 99% confidence level, what size of sample is needed?
You want to determine if the proportion of people who will vote for the president next year has increased due to current events. You take a simple random sample of 1100 individuals and find that 897 of them said that they will be voting in the election. Construct a 95% confidence interval, by hand (mean using the equations in the section). Show your work. And then write the conclusion to the confidence interval (follow the examples in the modules) in a complete sentence.
You observe 40 customers at a coffee shop, and 77% of them tip. What is the 95% confidence interval for the proportion of customers that tip? Group of answer choices (0.661, 0.879) (0.010, 0.951) (0.703, 0.837) (0.640, 0.900) thanks
A political candidate has asked you to conduct a poll to determine what percentage of people support her. If the candidate only wants a 9% margin of error at a 90% confidence level, what size of sample is needed?
A research institute poll asked respondents if they felt vulnerable to identity theft. In the poll, n=935 and x=561 who said "yes." Use a 95% confidence level.
Charlie tests whether there are more male or female coffee drinkers at his university's coffee shop. One day, he collects data on gender from 76 customers. If the gender ratio is 55 percent female, what is the expected number of male customers if the null hypothesis is true?
Dave is a member of the high school basketball team. Last week, his success rate for shooting a basket was 55%. If he attempted 336 baskets, find the confidence interval for a 99%confidence level. a (44.95%, 65.05%) b (54.9%, 55.1%) c (48.1%, 61.9%) d (50.5%, 59.5%)
Through polling, it was estimated that the percent of people who will vote for a particular candidate in an upcoming election is 36.2%. If the margin of error is 3.5, give the confidence interval for the percentage of people who will vote for the candidate in the upcoming election.% to %

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