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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For the three-part question that follows, provide your answer to each question in the given workspace. Identify each part with a coordinating response. Be sure to clearly label each part of your response as Part A, Part B, and Part C.Part A: What is the term for a generalization made about a population using the data from a sample?Part B: Name one challenge that may occur when using a sample to draw a conclusion about a population.Part C: A researcher collects data about the annual salary of employees who work in the information technology field. It would be difficult to survey all employees, so a sample of the population is surveyed. The data is recorded below. Use the table to write one conclusion that can be drawn. Explain why this conclusion is valid. Salary Range (Per Year) Number of Employees $50,000-$59,999 147 $60,000-$69,999 159 $70,000-$79,999 225 $80,000-$89,999 27
A radio talk show host with a large audience is interested in the proportion of adults in his listening area that think the drinking age should be lowered to 18. To find out, he poses the following question to his listeners: “Do you think that the drinking age should be reduced to 18 in light of the fact that 18-year-olds are eligible for military service?” He asks listeners to phone in and vote “yes” if they agree the drinking age should be lowered and “no” if not. Reference: Ref 12-4 You are told that the sample proportion of those who phoned in and answered yes is = 0.70 and the standard error of the sample proportion is 0.0459. The number of people who phoned in Select one: a. is 21. b. is 50. c. is 100. d. is 200. e. cannot be determined from the information given.
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Read the following problem description then choose the correct null and alternative hypothesis. A skeptical paranormal researcher claims that the proportion of Americans that have seen a UFO is less than 1 in every one thousand.
According to the CDC, only 20% of Americans get enough exercise each week. You conduct a survey of 200 people and find 45 who get enough exercise. a. What is the parameter? A. The proportion of people in the survey who get enough exercise. B. The proportion of all Americans who get enough exercise. C. All Americans. D. The people in the survey. E. All Americans who get enough exercise. b. What is the numerical value of the parameter? (If your answer is a proportion, enter it as a number between 0 and 1. If the numerical value is not known, enter “NA” without the quotes.) c. What is the statistic? A. All Americans who get enough exercise. B. The people in the survey. C. The proportion of people in the survey who get enough exercise. D. The proportion of all Americans who get enough exercise. E. The people in the survey who get enough exercise.d. What is the numerical value of the statistic? (If your answer is a proportion, enter it as a number between 0 and 1. If the numerical value is…
An industrial/organizational psychologist wants to improve worker productivity for a client firm, but first he needs to gain a better understanding of the life of the typical white-collar professional. Fortunately, he has access to the 2008 Workplace Productivity Survey, commissioned by LexisNexis and prepared by WorldOne Research, which surveyed a sample of 650 white-collar professionals (250 legal professionals and 400 other professionals). One of the survey questions was, “How many work-related emails do you receive during a typical workday?” For the subsample of legal professionals (n = 250), the mean response was M = 36.7 emails, with a sample standard deviation of s = 21.2 emails. The psychologist can be 99% confident that the interval from to includes the unknown population mean µ. Normally the psychologist will not know the value of the population mean. But consider the (unrealistic) scenario that a census of legal professionals is conducted. The census reveals…
A company has 30 employees, including a director. The lowest salary among the 30 employees is $22,000. The director’s salary is $180,000, which is more than twice as much as anyone else’s salary. Decide for each of the following statements about the 30 salaries whether it is true, false, or you cannot tell on the basis of the information at hand. • The median salary is below $60,000.• The average salary is below $60,000.• If all salaries are increased by $1,000, that adds $1,000 to the average.• If the director’s salary is doubled, and all other salaries remain the same, that increases the average salary.• If the director’s salary is doubled, and all other salaries remain the same, that increases the median salary.• The standard deviation of the salaries is larger than $180,000
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A media personality argues that global temperatures are not rising, because every year an increase is reported such as 0.08 degrees C. The difference from the previous year is less than the margin of error of about 0.15 degrees C, so that difference should be ignored. What is a strong counterarguement? A. Even 0.08 degrees is a lot and thus should be considered. B. The margin of error is just extra information and thus can be ignored. C. The difference with any previous decade is much greater than the margin of error. D. 0.15 - 0.08 is 0.07, which is still an increase and thus should be considered.
In 2010, the U.S. Congress passed the historic health care reform bill that will provide some type of coverage for the 32 million Americans currently without health care insurance. Just how widespread is the lack of medical coverage? The media claim that the segments of the population most at risk for disease and thus needing healthcare are women, children, the elderly and the poor. The following tables were generated from the U.S. Census Bureau, Current Population Survey, Annual Social and Economic Supplement (2011). The tables report the number of uninsured (in thousands) by sex, by age, and by household income. Is being insured or not dependent on gender? Fill in the degrees of freedom and p-value in the output below and draw a clear conclusion indicating which gender is more at risk of not being insured if there is a significant difference.
8) In the US, 4.5% of the population identifies as lesbian, gay, bisexual, or transgender (see, for instance, this report). In the UK, the LGBT community accounts for 1.5% of the population. Which of the following can be inferred from the given information? a) The number of LGBT individuals in the US is greater than that in the UK. b) The proportion of LGBT individuals in the US is 3% greater than the proportion of LGBT individuals in the UK. c) The proportion of LGBT individuals in the UK is 3% less than that in the US. d) The proportion of LGBT individuals in the UK is 200% greater than that in the US. e) The proportion of LGBT individuals in the US is 200% greater than that in the UK.
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