4.69 Superstitions survey. Are Americans superstitious? AHarris (Feb. 2013) poll of over 2,000 adult Americans wasdesigned to answer this question. One survey item con-cerned the phrase "see a penny, pick it up, all day longyou'll have good luck." The poll found that just one-thirdof Americans (33%) believe finding and picking up apenny is good luck. Consider a random sample of 20 Ú.S.adults and let x represent the number who believe findingand picking up a penny is good luck.a. For this experiment, define the event that represents a"success."b. Explain why x is (approximately) a binomial randomvariable.c. Give the value of p for this binomial experiment.

Answered: Image /qna-images/answer/646a8496-0f6c-4fa3-bbe6-a5bf913cd4ff.jpg

Answered: 4.69 Superstitions survey. Are…

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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If a questionnaire is given through a face to face interview, what is should the researchers make sure? - This question is based on Research Methodology. A. That the interviewer is well trained.B. All options are correct.C. That the interviewer fits in well with the population surveyed.D. That the interviewer knows the questionnaire well.
There is an archaeological study area located in southwestern New Mexico. Potsherds are broken pieces of prehistoric Native American clay vessels. One type of painted ceramic vessel is called Mimbres classic black-on-white. At three different sites, the number of such sherds was counted in local dwelling excavations. Site I Site II Site III 68 23 14 30 19 38 20 55 67 19 68 22 81 10 50 19 23 Shall we reject or not reject the claim that there is no difference in population mean Mimbres classic black-on-white sherd counts for the three sites? Use a 1% level of significance. (b) Find SSTOT, SSBET, and SSW and check that SSTOT = SSBET + SSW. (Round your answers to three decimal places.) SSTOT = SSBET = SSW = Find d.f.BET, d.f.W, MSBET, and MSW. (Round your answers for MSBET, and MSW to two decimal places.) d.f.BET = d.f.W = MSBET = MSW = Find the value of the sample F statistic. (Round your answer to two decimal places.)What…
An article summarizes a report of law enforcement agencies regarding the use of social media to screen applicants for employment. The report was based on a survey of 738 law enforcement agencies. One question on the survey asked if the agency routinely reviewed applicant's social media activity during background checks. For purposes of this exercise, suppose that the 738 agencies were selected at random, and that you want to use the survey data to decide if there is convincing evidence that more than 25% of law enforcement agencies review applicants' social media activity as part of routine background checks. (a) The sampling distribution of p describes the behavior of p when random samples are selected from a particular population. Describe the shape, center, and spread of the sampling distribution of p for samples of size 738 if the null hypothesis Ho: p = 0.25 is true. (Round your answers to three decimal places.) The sampling distribution of p is ---Select--- O; and has mean Hp and…
1. XYZ Cable corporation employs 2,500 people. If a random sample of 165 is taken from the entire population by systematic sampling. From which number will you choose the starting number?
In order to generalize to a population a sample must be randomly selected O a. Cannot say O b. True O c. False
An article summarizes a report of law enforcement agencies regarding the use of social media to screen applicants for employment. The report was based on a survey of 735 law enforcement agencies. One question on the survey asked if the agency routinely reviewed applicant's social media activity during background checks. For purposes of this exercise, suppose that the 735 agencies were selected at random, and that you want to use the survey data to decide if there is convincing evidence that more than 25% of law enforcement agencies review applicants' social media activity as part of routine background checks. (a) The sampling distribution of p describes the behavior of p when random samples are selected from a particular population. Describe the shape, center, and spread of the sampling distribution of p for samples of size 735 if the null hypothesis H,: p = 0.25 is true. (Round your answers to three decimal places.) The sampling distribution of p is -Select-- and has mean u, | and…
A survey of 1088 adults in a country, asking "As you may know, as part of its effort to investigate terrorism, a federal government agency obtained records from larger telephone and Internet companies in order to compile telephone call logs and Internet communications. Based on what you have heard or read about the program, would you say that you approve or disapprove of this government program?" Of those surveyed, 588 said they disapprove. a. Determine and interpret the sample proportion. b. At the 10% significance level, do the data provide sufficient evidence to conclude that a majority (more than 50%) of adults in the country disapprove of this government surveillance program? ..... a. The sample proportion is (Round to two decimal places as needed.) The sample proportion from this study is the proportion of adults in the that of the government surveillance program. b. What are the hypotheses for the one-proportion z-test? Ho: p= Ha:p (Type integers or decimals.) What is the test…
5. The Department of Health in a major US city is concerned about the reported number of COVID-19 cases in the school system. There are 1,722 schools in the city. The department of health selects an SRS of 256 schools and conducts testing at each one. Which of the following best describes the sample in this context? a. The 256 schools tested. b. All schools in the US c. All covid-19 cases d. All schools in the city
Survey questions Examine each of the following ques-tions for possible bias. If you think the question is biased, indicate how and propose a better question.a) Should companies that pollute the environment becompelled to pay the costs of cleanup?b) Given that 18-year-olds are old enough to vote andto serve in the military, is it fair to set the drinkingage at 21?
Given a data set, how do you know whether to calculate o or s? Choose the correct answer below. A. If the given data set contains a large number of entries, then s is calculated. If the data set contains a small number of entries, then σ is calculated. B. When given a data set, one would have to determine if it represented the population or if it was a sample taken from the population. If the data are a population, then o is calculated. If the data are a sample, then s is calculated. C. If the given data set contains a large number of entries, then o is calculated. If the data set contains a small number of entries, then s is calculated. D. When given a data set, one would have to determine if it represented the population or if it was a sample taken from the population. If the data are a population, then s is calculated. If the data are a sample, then o is calculated.

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