In a survey conducted by a website, employers were asked if they had ever sent an employee home because they were dressed inappropriately. A total of 2769 employers responded to thesurvey, with 978 saying that they had sent an employee home for inappropriate attire. In a press release, the website makes the claim that more than one-third of employers have sent anemployee home to change clothes.Do the sample data provide convincing evidence in support of this claim? Test the relevant hypotheses using a = 0.05. For purposes of this exercise, assume that it is reasonable to regard thesample as representative of employers in the United States. (Round your test statistic to two decimal places and your P-value to four decimal places.)z = 1.64 XP-value = 0.0050 XState your conclusion.Reject Ho. We do not have convincing evidence that more than one-third of employers have sent an employee home to change clothes.Do not reject Ho. We have convincing evidence that more than one-third of employers have sent an employee home to change clothes.Do not reject Ho. We do not have convincing evidence that more than one-third of employers have sent an employee home to change clothes.Reject Ho. We have convincing evidence that more than one-third of employers have sent an employee home to change clothes.

From given data we have : n=2769 x=978 The claim is more than one-third of employers have sent and…

Answered: In a survey conducted by a website,…

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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In a survey conducted by the Gallup organization September 6-9, 2012, 1,017 adults were were asked "in general, how much do you trust and confidence do you have in the mass media-sucb as newspaper, TV, and radio-when it comes to reporting the news fully, accurately, and fairly?" 81 said that they had a "great deal" of xonfidence, 325 said they had a "fair amount" of confidence, 397 said they had "not very much" confidence, and 214 said they had "no confidence at all". A) display the results in a relative frequency table. B) sketch a bar chart of the data. C) give a relative frequency table of the data. use two decimal places in your relative frequencies.
The research group asked the following question of individuals who earned in excess of $100,000 per year and those who earned less than $100,000 per year: "Do you believe that it is morally wrong for unwed women to have children?" Of the 1,205individuals who earned in excess of $100,000 per year, 712 said yes; of the 1,310individuals who earned less than $100,000 per year, 700 said yes. Construct a 95% confidence interval to determine if there is a difference in the proportion of individuals who believe it is morally wrong for unwed women to have children. Lower Bound: Upper Bound:
Theres a sampled of 361 people in total. People were allowed to self-identify as a heavy smoker or a non-smoker (mutually exclusive outcomes), and as diagnosed with lung cancer or not diagnosed with lung cancer (mutually exclusive outcomes). All surveyed people were under the age of 55, with similar age distributions in the smoking and not smoking categories. 343 people said that they did not smoke, and of those 343 people, 58 had been diagnosed with lung cancer. Only 18 people said that they were heavy smokers, and of those 18, 14 had been diagnosed with lung cancer. A. A chi-squared test of independence yields a p-value of 2e-9. Assuming an alpha of 0.05, what can you conclude from the data based solely on the chi-squared test? Explain. B. 95% Cl of odd ratios (OR) of odds (cancer / smoking) / odds (cancer /no cancer ) is 5.1 -73.5. What can you conclude based solely on the odds?
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When asked “What do you think is more important to protect the right of Americans to own guns or to control gun ownership?” 46% of all Americans said protecting the right to own guns is more important. 1267 randomly selected American were surveyed with at least a BS degree and it was found that 559 of them believed that protecting the right to own guns is more important. Does this result suggest the proportion of Americans with at least a BS degree feel differently than the general American population when it comes to gun control? Use the α = 0.1 level of significance.
A real estate company claims that 44% of all home buyers find their real estate agent through a friend. In your work for this company, you find that in a sample of 1762 home buyers, 712 found their real estate agent through a friend. Can you reject the company’s claim at the 0.01 significance level? Using the hypothesis test.
A simple random sample of 30 residents from Seattle is taken to estimate the median income of all Seattle residents.Is this studyA. REPRESENTATIVE?B. NON-REPRESENTATIVE?A sample of professional football players is taken to estimate the mean weight of all adult males.Is this studyA. REPRESENTATIVE?B. NON-REPRESENTATIVE?A telephone survey is conducted during the day in order to determine the chances of a certain candidate winning an election.Is this studyA. REPRESENTATIVE?B. NON-REPRESENTATIVE?Using a sample of 40 patients from a local hospital, researchers measured cholesterol level in an attempt to estimate the mean cholesterol level of U.S. citizens.Is this studyA. REPRESENTATIVE?B. NON-REPRESENTATIVE?
A nonprofit organization conducted a survey of 2110 metropolitan-area teachers regarding their beliefs about educational problems. The following data were obtained: 860 said that lack of parental support is a problem. 880 said that abused or neglected children are problems. 660 said that malnutrition or students in poor health is a problem. 100 said that lack of parental support and abused or neglected children are problems. 90 said that lack of parental support and malnutrition or poor health are problems. 130 said that abused or neglected children and malnutrition or poor health are problems. 30 said that lack of parental support, abuse or neglect, and malnutrition or poor health are problems. What is the probability that a teacher selected at random from this group said that lack of parental support is the only problem hampering a student's schooling? Hint: Draw a Venn diagram. (Round your answer to three decimal places.) Need Help? Watch It Talk to a Tutor
A radio news story claimed that half of all U.S. adults have Internet access. In a national poll about Internet usage (The Pew Internet Project), 12,638 U.S. adults were surveyed and it was found that 6413 of those surveyed had Internet access. At a 5% level of significance, perform a hypothesis test to test the claim made by the radio news story. The correct conclusion is: Group of answer choices half of all U.S. adults have Internet access. less than half of all U.S. adults have Internet access. The percentage of U.S. adults that have Internet access is not one-half. more than half of all U.S. adults have Internet access.
2. A marketing manager for a phone company claims that 55% of children ages 8-12 have their own cell phones. In a random survey of 802 children ages 8-12, 460 of them had phones. Conduct a hypothesis test for the manager's claim. Use a x= 0.05 significance level. a. Write the null and alternative hypothesis b. Find the test statistic (2 decimal places) c. Find the p-value (4 decimal places) d. Decision: reject or fail to reject? Why? e. Conclusion in context of the problem Calculator Command
The owner of a football team claims that the average attendance at games is over 80,000, and he is therefore justified in moving the team to a city with a larger stadium. An independent investigator will conduct a significance test to determine whether his claim is accurate. Choose the best answer below: A. Right-tailed B. Two-tailed C. Middle-tailed D. Left-tailed E. Neither
From the U.S. Census Bureau's American Community Survey in 2019 it was found that 33.13% of United States residents over the age of 25 had an educational attainment of a bachelor's degree or higher. In the District of Columbia, the percentage of residents over the age of 25 who had attained a bachelor's degree or higher was 59.67%. An investigator for the U.S. Census Bureau took a random sample of seven residents from the District of Columbia and asked them their highest educational degree they had obtained. When there is no data set posted for an investigation, open a blank StatCrunch page by clicking "Open StatCrunch" on the StatCrunch home page. a) Verify that the sample from the District of Columbia satisfies the conditions of the binomial experiment. Write one sentence to check each requirement in context of the investigation. b) Assuming the sample from the District of Columbia is a binomial experiment, build the probability distribution in a single table and include the table in…

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