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 be 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
Bundle: Understandable Statistics: Concepts And Methods, 12th + Webassign, Single-term Printed Access Card
- If a man has 4 sweaters and 5 pairs of slacks, how many different outfit can he wear?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
- Out of 1000 people surveyed, 850 said they like chocolate. What proportion of people surveyed said they do not like chocolate?arrow_forwardA local politician running for school board wants to know where he is ranked in the polls before the official election.Part A: Provide an example of a sample the politician could measure to gauge his standings.Part B: Provide an example of a population the politician could measure to gauge his standings. Part C: Write a complete sentence to explain the difference between a sample and a population.arrow_forwardTwo children are painting. The first child mixes 3 ounces of red paint with 2 ounces of yellow paint. The second child mixes 4 ounces of red paint with 4 ounces of yellow paint. Which child’s mixture looks more red? (Assume that both mixtures are well mixed.) The first child’s mixture looks more red. The second child’s mixture looks more red. Both mixtures look equally red. There is not enough information to tell.arrow_forward
- The question was asking for the number of customers to break even.arrow_forwardDr. A. Ventura is interested in determining what kinds and how many pets people own in Bakersfield. He stands outside Petco and asks people what kind of pet they own. This is the result of his survey: dog=1; cat=2; bird=3; reptile=4; fish=5; other=6 1,1,2,2,2,1,1,3,2,3,1,1,1,2,2,4,4,2,2,1,1,1,5,4,3,4,1,1,1,2,2,6,1,1,2,2,1,2,1,2,6,3,4,5arrow_forwardIt is harder to get into graduate programs in psychology or history? We randomly selected five institutions from among all U.S. institutions with graduate programs. The first number for each is the minimum GPA for applicants to the psychology doctoral program, and the second is for applicants to the history doctoral program. These GPAs were posted on the website of the well-known college guide company Peterson's. Wayne State University: 3.0, 2.75 University of Iowa: 3.0, 3.0 University of Nevada-Reno: 3.0, 2.75 George Washington University: 3.0, 3.0 University of Wyoming: 3.0, 3.0 1. The participants are not people, explain why it is appropriate to use a paired-samples t test for this situation.arrow_forward
- The kindergartners and first and second graders were talking about their favorite field trips during the school year. One of the teachers, Ms. Brewer, turned the discussion into a math lesson, and the students conducted a survey. Each child wrote down on paper which trip was his or her favorite. (Note that many children named more than one field trip as their favorite.) The survey revealed that 55 wrote down the trip to the river, 48 indicated the trip to the police station, and 38 included the trip to the hardware store. The police station and the river were chosen on 32 papers, 26 papers included both the river and the hardware store, and 22 children wrote down the police station and the hardware store on their papers. Ms. Burke counted 17 papers that included all three and one that did not list any of the three trips. How many children were surveyed? How many children wrote down the river but not the police station? How many children did not list the hardware store?arrow_forwardA management survey for a company surveyed 235 employees. 105 of the employees surveyed were females. What percentage were males?arrow_forwardThere were 637 cases of identity theft reported last year in South Dakota. The population of South Dakota is 0.9 million. Which of the following best interprets the identity theft per capita for South Dakota? a.There were approximately 7 cases of identity theft in for every 10,000 people in South Dakota. b.Approximately 1412 people in South Dakota were impacted by each case of identity theft. c.There were 1413 cases of identity theft per person in South Dakota. d.There were approximately 6370 cases of identity theft per every million people in South Dakota. e.Approximately 0.7% of South Dakota suffered some form of identity theft.arrow_forward
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