Critical Thinking A brief survey regarding opinions about recycling was carefully designed so that the wording of the questions would not influence the responses. Jill administered the survey at a farmer’s market. She approached adults and asked if they would fill out the survey, explaining that the results might he used to set trash collection and recycling policy in the city. She stood by silently while the form was filled out. Jill was wearing a green T-shirt with the slogan “fight global warming.” Are the respondents a random sample of people in the community? Are there any concerns that Jill might have influenced the respondents?
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Chapter 1 Solutions
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- If a man has 4 sweaters and 5 pairs of slacks, how many different outfit can he wear?arrow_forwardSeveral years ago, two companies merged. One of the concerns after the merger was the increasing burden of retirement expenditures. An effort was made to encourage employees to participate in the 401(k) accounts. Nationwide, 63% of eligible workers participated in these accounts. The accompanying data table contains responses of 30 employees of the company when asked if they were currently participating in a 401(k) account. Complete parts a through d. Click the icon to view the data table. a. Determine the sample proportion of company workers who participate in 401(k) accounts. The sample proportion is. (Round to three decimal places as needed.) b. Determine the sampling error if in reality the company workers have the same proportion of participants in 401(k) accounts as does the rest of the nation. The error is (Round to three decimal places as needed.) c. Determine the probability that a sample proportion at least as large as that obtained in the sample would be obtained if the…arrow_forwardSeveral years ago, two companies merged. One of the concerns after the merger was the increasing burden of retirement expenditures. An effort was made to encourage employees to participate in the 401(k) accounts. Nationwide, 63% of eligible workers participated in these accounts. The accompanying data table contains responses of 30 employees of the company when asked if they were currently participating in a 401(k) account. Complete parts a through d. Click the icon to view the data table. a. Determine the sample proportion of company workers who participate in 401(k) accounts. The sample proportion is. (Round to three decimal places as needed.) b. Determine the sampling error if in reality the company workers have the same proportion of participants in 401(k) accounts as does the rest of the nation. The error is (Round to three decimal places as needed.) c. Determine the probability that a sample proportion at least as large as that obtained in the sample would be obtained if the…arrow_forward
- Several years ago, two companies merged. One of the concerns after the merger was the increasing burden of retirement expenditures. An effort was made to encourage employees to participate in the 401(k) accounts. Nationwide, 62% of eligible workers participated in these accounts. The accompanying data table contains responses of 30 employees of the company when asked if they were currently participating in a 401(k) account. Complete parts a through d. Click the icon to view the data table. a. Determine the sample proportion of company workers who participate in 401(k) accounts. The sample proportion is (Round to three decimal places as needed.) b. Determine the sampling error if in reality the company workers have the same proportion of participants in 401(k) accounts as does the rest of the nation. The error is. (Round to three decimal places as needed.) c. Determine the probability that a sample proportion at least as large as that obtained in the sample would be obtained if the…arrow_forwardSeveral years ago, two companies merged. One of the concerns after the merger was the increasing burden of retirement expenditures. An effort was made to encourage employees to participate in the 401(k) accounts. Nationwide, 67% of eligible workers participated in these accounts. The accompanying data table contains responses of 30 employees of the company when asked if they were currently participating in a 401(k) account. Complete parts a through d. Click the icon to view the data table. a. Determine the sample proportion of company workers who participate in 401(k) accounts. The sample proportion is (Round to three decimal places as needed.) b. Determine the sampling error if in reality the company workers have the same proportion of participants in 401(k) accounts as does the rest of the nation. The error is . (Round to three decimal places as needed.) c. Determine the probability that a sample proportion at least as large as that obtained in the sample would be obtained if the…arrow_forwardCostume designers are fashion designers that design costumes for the performing arts and for motion picture and television productions. They research the styles worn during the period in which the performance takes place, or work with directors to select and create appropriate attire. They must stay within the costume budget for the production. An upcoming play requires 6 bunny costumes. Each costume requires 3 square yards of faux fur. Faux fur costs $9.50 per square yard and the costume budget for the bunny costumes is $200. What is the total cost of material for the bunny costumes? $arrow_forward
- A random sample of BYU-Idaho students was surveyed and asked if they were in favor of retaining the penny as a form of currency in the United States. Out of the 116 women surveyed, 80 said that they were in favor of retaining the penny as a form of currency. Of the 137 men surveyed, 91 said that they were in favor of retaining the penny. Difference = Women - Men The picture below is the question. Use the information above to help.arrow_forwardA school superintendent wanted to know whether there were differences between the high schools in her district with regards to the proportion of students who do not live with their biological parents. She surveyed 200 students from each of the two high schools – East and West. The proportion of students from the survey at East who do not live with their biological parents is 3.4%. The proportion of students from the survey at East who do not live with their biological parents is 4.2%. Using a 95% confidence interval (2SD or Theory based), can the superintendent conclude that there is a difference between East and West with respect to the proportion of students who do not live with their biological parents. Group of answer choices Yes she can conclude there is a difference because the confidence intervals overlap. No she cannot conclude there is a difference because the confidence intervals overlap. Yes she can conclude there is a difference because the confidence intervals don’t…arrow_forwardIn a survey of middle school students, 70% play basketball and 40% play basketball and football. Of those that play basketball, what percentage also plays football?arrow_forward
- A random sample of BYU-Idaho students was surveyed and asked if they were in favor of retaining the penny as a form of currency in the United States. Out of the 116 women surveyed, 80 said that they were in favor of retaining the penny as a form of currency. Of the 137 men surveyed, 91 said that they were in favor of retaining the penny. Difference = Women - Men The picture below is the question. Use the information above to help.arrow_forwardA market researcher's claim is that women spend more time each day on Facebook than men. If p1 represents the proportion of women on Facebook and p2 represents the proportion of men on Facebook, how would the researcher's claim be represented? a. p1 = p2 b. p1 > p2 c. p1 < p2arrow_forwardMaci is a social networking maniac! Although she prefers Instagram, she also spends a lot of time using Twitter, Pinterest, and Facebook. She is curious as to which social networking site is the most preferred for her age group, so she decides to conduct a study. Maci creates a survey to hand out to other students at her school. She plans to collect data from this survey and analyze the results to help her decide which social networking site is the most preferred. What is the variable of interest in this study? Maci survey social media sites the studentsarrow_forward
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