Use the following to answer the questions below:The Gallup organization recently conducted a survey of1,015 randomly selected U.S. adults about "Black Friday"shopping. They asked the following question:"As you know, the Friday after Thanksgiving is one of thebiggest shopping days of the year.Looking ahead, do you personally plan on shopping on theFriday after Thanksgiving, or not?"Their results, broken down by gender, are summarized inthe provided two-way table.MaleFemaleTotalMaleFemaleTotalYes Shopping No Shopping Total824335151005001821,015y to Edit Data and compute the expectedcell counts for all cells. Report your counts to two decimalplaces.Ho.HYes Shopping No Shopping Total5155001015182400833Use the Chi-Square Test for Association, at the 5%level, to test if there is a significant association between genderand plans to shop the Friday after Thanksgiving.Include all details of your test.p-value=Conclusion:833

The observed frequencies of individuals, who plan to shop based on their gender is given as…

Answered: Use the following to answer the…

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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Social life A question posted on the gamefaqs.com web-site on August 1, 2011, asked visitors to the site, “Do you have an active social life outside the Internet?” 22% ofthe 55,581 respondents said “No” or “Not really, most ofmy personal contact is online.”a) Can this survey be used to estimate the proportion ofU.S. adults who would say they have an active sociallife outside the Internet? Why or why not?b) Can this survey be used to estimate the proportion ofvisitors to their site who would say they have an activesocial life outside the Internet? Why or why not?
4- A florist is interested in the proportion of her clients that prefer roses in their flower arraignment. She surveys 30 customers. Define the following in terms of the study. Give examples where appropriate. a. Population b. Parameter d. Sample e. Statistic f. Variable g. Data
2. Which source of bias is most relevant to the following situation: A survey ask the following: Should the death penalty be permitted if innocent people might die?
You may need to use the appropriate appendix table or technology to answer this question. Last year, 45% of business owners gave a holiday gift to their employees. A survey of business owners conducted this year indicates that 30% plan to provide a holiday gift to their employees. Suppose the survey results are based on a sample of 80 business owners. (a) How many business owners in the survey plan to provide a holiday gift to their employees this year? business owners (b) Suppose the business owners in the sample did as they plan. Compute the p-value for a hypothesis test that can be used to determine if the proportion of business owners providing holiday gifts has decreased from last year. Find the value of the test statistic. (Round your answer to two decimal places.) Find the p-value. (Round your answer to four decimal places.) p-value = (c) Using a 0.05 level of significance, would you conclude that the proportion of business owners providing gifts decreased? Do not…
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Students at Dover Community College have a mean credit card debt of $4,700 with a median of $2,900. Students at Ralton Community College have a mean credit card debt of $2,100 with a median of $1,900. Which of the following statements are true based on this information? There may be more than one correct answer. i. No more than half of Ralton students have debt more than $1,900. ii. The total debt of Ralton students is more than the total debt of Dover students. iii. The largest debt of the Ralton students is less than the largest debt of the Dover students. iv. About one-fourth of Ralton students have debt more than $2,100. v. Less than half of Dover students have debt more than $4,700.
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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?
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Readers of the magazine Popular Science (August 1990) were asked to phone in (on a 900 number) their responses to the following question: “Should the United States build more fossil-fuel generating plants or the new so-called safe nuclear generators to meet the energy crisis of the 90s?” Of the total call-ins, 86% chose the nuclear option. What do you think about the way the poll was conducted? What do you think about the way the question was worded? Do you think the results are a good estimate of the prevailing mood of the country?
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By a small margin, Facebook remains the top choice of social media over all ages, with 29% using Facebook most often among those using social media sites. However, more visually oriented social networks such as Snapchat and Instagram continue to draw in younger audiences. When asked "Which one social networking brand do you use most often?" the results in the table show the top brands chosen by Americans aged 12-34 who currently use any social networking site or service. Social M edia Site Faceboo k Snapchat Instagra m Twitter Percentage That Use Most Often 29 28 26 6 20 (a) What is the sum of the percentages for these top social media sites? Give your answer as an exact number. Macmillan Learning top social media sites: What percent of Americans aged 12-34 use other social media sites most often? Give your answer as an exact number. other social media sites: do %

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