Intro Stats, Books a la Carte Edition (5th Edition)
5th Edition
ISBN: 9780134210285
Author: Richard D. De Veaux, Paul Velleman, David E. Bock
Publisher: PEARSON
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Textbook Question
Chapter 10.4, Problem 2JC
We need to survey a random sample of the 300 passengers on a flight from San Francisco to Tokyo. Name each sampling method described below.
- a) Pick every 10th passenger as people board the plane.
- b) From the boarding list, randomly choose 5 people flying first class and 25 of the other passengers.
- c) Randomly generate 30 seat numbers and survey the passengers who sit there.
- d) Randomly select a seat position (right window, right center, right aisle, etc.) and survey all the passengers sitting in those seats.
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You are going to survey a random sample of the 300 passengers on a flight from San Francisco to Tokyo. Name each sampling method described. a. Randomly generate 30 seat numbers and survey the passengers who sit there. b. Randomly select a seat position (right window, center, aisle, etc.) and survey all of the passengers sitting in those seats.
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a. systematic sample
b. convenience sample
C. stratified sample
d. cluster sample
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e. simple random sample
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A population of 20 students is shown below. Select a sample of 8 students on the
basis of gender (male/female) and grade level (freshman/sophomore) by stratified
sampling. Write the name of the selected students.
Step / Guide: Divide the population into 2 subgroups, consisting of males and females.
Further divide each subgroup into 2 groups of freshmen and sophomores. Note that
the students are arranged alphabetically. For group 1, select students number 5 and 4.
For group 2, select students number 5 and 2. For group 3, select students number 1
and 3. For group 4, select students number 3 and 4.
1. Ald, Peter
2. Brown, Danny
3. Bear, Theresa
4. Carson, Susan
5. Collins, Carolyn
6. Davis, William
7. Hogan, Michael
8. Jones, Lois
9. Lutz, Harry
10. Lyons, Larry
11. Martin, Janice
12. Meloski, Gary
13. Oeler, George
14. Peters, Michele
15. Peterson, John
16. Smith, Nancy
17. Thomas, Jeff
18. Toms, Debbie
19. Unger, Roberta
20. Zibert, Mary
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Chapter 10 Solutions
Intro Stats, Books a la Carte Edition (5th Edition)
Ch. 10.2 - Various claims are often made for surveys. Why is...Ch. 10.4 - We need to survey a random sample of the 300...Ch. 10 - Texas AM Administrators at Texas AM University...Ch. 10 - Satisfied workers The managers of a large company...Ch. 10 - AM again The president of the university plans a...Ch. 10 - Satisfied respondents The companys annual report...Ch. 10 - Sampling students A professor teaching a large...Ch. 10 - Sampling satisfaction A company hoping to assess...Ch. 10 - Sampling AM students For each scenario, identify...Ch. 10 - Satisfactory satisfaction samples For each...
Ch. 10 - Survey students What problems do you see with...Ch. 10 - Happy employees The company plans to have the head...Ch. 10 - Student samples The university administration of...Ch. 10 - Surveying employees The company of Exercise 2 is...Ch. 10 - Roper Through their Roper Reports Worldwide, GfK...Ch. 10 - Student center survey For their class project, a...Ch. 10 - Drug tests Major League Baseball tests players to...Ch. 10 - Gallup At its website (www.gallup.com), the Gallup...Ch. 10 - In Exercises 17 to 23, for the reports about...Ch. 10 - In Exercises 17 to 23, for the reports about...Ch. 10 - In Exercises 17 to 23, for the reports about...Ch. 10 - Prob. 20ECh. 10 - In Exercises 17 to 23, for the reports about...Ch. 10 - In Exercises 17 to 23, for the reports about...Ch. 10 - In Exercises 17 to 23, for the reports about...Ch. 10 - Mistaken poll A local TV station conducted a...Ch. 10 - Another mistaken poll Prior to the mayoral...Ch. 10 - Parent opinion, part 1 In a large city school...Ch. 10 - Parent opinion, part 2 Lets revisit the school...Ch. 10 - Prob. 28ECh. 10 - Prob. 29ECh. 10 - Roller coasters An amusement park has opened a new...Ch. 10 - Playground, act two The survey described in...Ch. 10 - Wording the survey Two members of the PTA...Ch. 10 - Banning ephedra An online poll on a website asked:...Ch. 10 - Survey questions Examine each of the following...Ch. 10 - More survey questions Examine each of the...Ch. 10 - Phone surveys Any time we conduct a survey, we...Ch. 10 - Cell phone survey What about drawing a random...Ch. 10 - Fuel economy Occasionally, when I fill my car with...Ch. 10 - Prob. 40ECh. 10 - Prob. 41ECh. 10 - Quality control Sammys Salsa, a small local...Ch. 10 - A fish story Concerned about reports of discolored...Ch. 10 - Prob. 44ECh. 10 - Prob. 45ECh. 10 - More sampling methods Consider each of these...
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- Mrs. Trahan samples her class by picking 10 numbers from her hat and each number is assigned to a student. This is random sampling. Select one: a. simple b. cluster C. systematic d. stratifiedarrow_forwardEspa Kala has two ways to travel from her home in Norco to her office in Los Angeles. One is to go via the 10 Freeway, and the other is to go via 60 Freeway. In order to determine which way she should travel on a daily basis, Kala has recorded the travel times for samples of fourteen trips via the 10 Freeway and fourteen trips via the 60 Freeway. The following table gives the travel times (in minutes) for the twenty-eight trips. Travel times in minutes 10 Freeway 67, 71, 69, 67, 74, 73, 70, 76, 74, 74, 69, 75, 67, 73 60 Freeway 75, 69, 69, 78, 75, 75, 71, 79, 81, 76, 77, 70, 74, 74 Send data to calculator Send data to Excel Assume that the two populations of travel times are normally distributed and that the population variances are equal. Can we conclude, at the 0.01 level of significance, that the mean vel time via the 10 freeway, is different from µ,, the mean travel time via the 60 freeway? Perform a two-tailed test. Then complete the parts below. Carry your intermediate…arrow_forwardIn Ms. Noime's math class there are 15 students out of which 4 will be selected to receive a special award. How many selections are there?arrow_forward
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- A professor is interested in the average length of books in her library. She has divided her books into a few different categories: 235 books on mathematics, 290 books on sports, and 166 books on interior design. Rather than examining all the books, she plans to use a stratified sample of 50 books. How many sportsbooks should she choose? Enter a whole number.arrow_forwardIn a poll of 556 human resource professionals, 42.3% said that body piercings and tattoos were big grooming red flags. Complete parts (a) through (d) below. a) Among the 556 human resource professionals who were surveyed, how many of them said that body piercings and tattoos were big grooming red flags?arrow_forwardThe school librarian wants to determine how many students use the library on a regular basis. What type of sampling method would she use if she chose to select every 3rd student who enters the library on Tuesday.arrow_forward
- Consider the U.S. Electoral College System. For each of the 50 states, determine the number of delegates received. Create a frequency table with 8 classes.arrow_forwardAs part of a class project a teacher brings a large jar containing 200 gum balls of 2 different colors, white and green to class. A student draws a sample of 20 gum balls, of which 4 are white and 16 are green. The students job is to estimate how many of the gum balls are white. A.) Use the sample to estimate the % of white gum balls in the jar. B.) Give the sampling proportion as a %. C.) If there were 60 white gum balls in the jar, give the parameter of white gum balls in the jar as a %. D.) Give the sampling error as a percent.arrow_forwardThere are 30 boys and 20 girls in a class. If a teacher selects a sample of boys and girls as per the proportion of the population, such sampling technique is called:arrow_forward
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