Some food retailers propose subjecting food to a low level of radiation in order to improve safety, but sale ofsuch "irradiated" food is opposed by many people. Suppose a grocer wants to find out what his customers think. He hascashiers distribute surveys at checkout and ask customers to fill them out and drop them in a box near the front door. Hegets responses from 130 customers, of whom 79 oppose the radiation treatments. What can the grocer conclude aboutthe opinions of all his customers?Choose the correct answer Delow, filling in any input boxes as necessary,A. The grocer can conclude, with 95% confidence, that the proportion of all his customers that oppose "irradiated"food falls in the interval(Round to four decimal places as needed. Use ascending order.)B. Probably nothing, because those who bothered to fill out the survey may be a biased sample.OC. Probably nothing, because the grocer's poll does not meet the Success/Failure Condition.OD. Probably nothing, Because the grocer's poll does not meet the 10% Condition

The question is about a confidence interval.Given :No. of customers who are responded ( n ) = 130No.…

Answered: Some food retailers propose subjecting…

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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A problem with polling is whether or not people are willing to answer honestly. If a question might be viewed as shameful or embarrassing (about politics, sexual activity, etc.), they may be reluctant to answer honestly. A potential solution to this is the following: let's suppose that 'YES’ is the embarrassing or socially shameful answer. Give the people you are polling the following instructions: flip a coin privately, and if it comes up heads, you must answer honestly. However, if it comes up tails, you must answer 'YES’ regardless of what the truth is. This gives people л plausible deniability about why they answered yes, if pressed. Again, let p, be the fraction of people who said 'YES'. Let p be the probability that a randomly selected person says YES’. Let q be the probability that a person’s true answer is 'YES’. Note л again, we have that the expected value of p,, is p, but we are actually interested in N measuring q.
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Prof. Henderson, always interested in improving her teaching effectiveness, has decided to undertake a careful analysis of her student evaluations from the past several years. The last question on the student evaluation form, Question 17, is "Would you recommend this professor to another student?" A matter of special concern to Prof. Henderson is how she is viewed by students of different majors. Each of Prof. Henderson's students can be placed into a category according to the student's major school. (Students who have majors from more than one school are not included.) So, there are two variables under consideration: student's major school ("School of Social Sciences", "School of Engineering", or "School of Physical Sciences") and answer to Question 17 ("No", "Maybe", or "Yes"). The contingency table below contains a summary of the responses to Question 17 for a random sample of 500 of Prof. Henderson's students. In each cell of the table is written three numbers: the first number is…
Suppose you were going to conduct a survey of visitors to your campus. You want the survey to be as representative as possible. How would you select the people to survey? Why would that be your best method?
The rabies vaccine for dogs can save your dog's life. If your dog bites another animal or is on the receiving end of a bite, the vaccine can protect them from a dangerous and potentially fatal illness. Furthermore, in most places, the rabies vaccine for dogs is legally required. The NYC Department of Health wants to know if LESS than 95% of the dogs in the city have been vaccinated with their rabies vaccine. 158,045 of the 165,000 dogs examined had their rabies shots. Risk no more than 5% Type I error. . What is the Z CRIT? A + 1.96 B + 1.645 C - 1.96 D - 1.645
A local blood center needs donors and has advertised on the college campus. Faculty, staff, and students all donated during the drive. Many also volunteered to help set up, hand out materials, and clean up at the end of the event. There were a total of 500 people surveyed about their involvement that day. Two hundred twenty-one of them gave blood. One hundred fifty-six helped with setting up and cleaning up, as well as handing out materials. If eighty-five people both helped and donated, find out how many people neither donated nor helped. There were respondents who neither donated nor helped. (Type a whole number.)
You wish to determine the impact expressive writing has on days spent in the hospital for elderly adults. However, it is difficult to estimate the population average of days spent in the hospital. Thus, we recruit 14 elderly adults and randomly assigned half to either write expressively about their most traumatic life event or to write about their plans for that day- both groups write 20-minute essays four days in a row and six months later are asked how many days they have spent in the hospital. Expressive writing condition: 2, 5, 1, 4, 4, 2, 3 Control condition: 8, 8, 5, 2, 7, 5, 7 Which statistical test would you select: Ho: H₁: Enter the data above into and JAMOVI and use the correct statistical procedure to test the null hypothesis - answer the following questions: What is the mean difference between the two samples? What is the standard error of the mean? What is the appropriate 95% CI? [ What is the d-effect size? What is the t-observed? } Based on the p-value (a = .05) should…
If 61% of Americans believe most school textbooks favor political correctness over accuracy, how many Americans in a group of 50 would you expect to believe this?
Write your own hypothesis.
There are two physician assistants (Pas) who wish to know how frequently they agree on a diagnosis of dementia. The PAs agreed on a dementia diagnosis n for 75 adults, and agreed that 225 adults did not have dementia. PA 1 classified dementia in a total of 95 adults, while PA 2 classified a total of 125 as having dementia. What is the overall percent agreement?
The rabies vaccine for dogs can save your dog's life. If your dog bites another animal or is on the receiving end of a bite, the vaccine can protect them from a dangerous and potentially fatal illness. Furthermore, in most places, the rabies vaccine for dogs is legally required. The NYC Department of Health wants to know if LESS than 95% of the dogs in the city have been vaccinated with their rabies vaccine. 158,045 of the 165,000 dogs examined had their rabies shots. Risk no more than 5% Type I error. What kind of test will you need to perform? A A right, one-tailed z-test B A left, one-tailed z-test C A two-tailed z- test
Suppose you are the manager of two beachfront hotels : The Palms and Golden Sands. You'd like to know if there is a difference in guest satisfaction between the two hotels. To investigate this, you conduct a survey and ask guests upon departure if they are likely to return to the hotel in the future. For The Palms, 163 out of 227 guests who were surveyed responded " yes ". For Golden Sands, 154 out of 262 guests responded "yes ". Answer the following questions. Round any numbers in your final answers to 2 decimals. 1) Calculate a 95 % confidence interval for the difference in satisfaction rates between The Palms and Golden Sands (Show work) 2) Use the critical value approach to test, at a 1% significance level, whether or not the guest satisfaction rates are different between the two hotels. What do you conclude ? (In your answer, show the steps involved with testing) 3) What is the p-value of your test in part 2?

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