Survey analysis In a survey of the dining preferences of 110 dormitory students at the end of the spring semester, the following facts were discovered about Adam’s Lunch (AL), Pizza Tower (PT), and the Dining Hall (DH). 15 liked AL but not PT 10 liked AL only 23 liked AL 42 liked PT 48 liked DH 4 liked PT and AL but not DH 25 liked PT and DH How many liked PT or DH? 65 39 25 52 27

Survey analysis In a survey of the dining preferences of 110 dormitory students at the end of the spring semester, the following facts were discovered about Adam’s Lunch (AL), Pizza Tower (PT), and the Dining Hall (DH). 15 liked AL but not PT 10 liked AL only 23 liked AL 42 liked PT 48 liked DH 4 liked PT and AL but not DH 25 liked PT and DH How many liked PT or DH? 65 39 25 52 27

Advanced Engineering Mathematics

10th Edition

ISBN:9780470458365

Author:Erwin Kreyszig

Publisher:Erwin Kreyszig

Chapter2: Second-order Linear Odes

Section: Chapter Questions

Problem 1RQ

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2) You want to find out if there is a food preference in between two species of bats. You collect the following data. You suspect species B prefers Beetles: Bat species A Bat species B Moths 23 9 Beetles 21 33 Do both species of bat have the same food preferences? Make sure you clearly state Ho, H₁, etc. Use a = 0.05. Also clearly write out your decision and what it means.
Instructor-created question The favorite sports of students in a statistics class are shown in the following table. Students' Favorite Sports O None Soccer Hockey Soccer Hockey Soccer 1. Frank 2. Angelica 3. Craig 4. Keith Baseball Нockey Нockey Football 5. Kat 6. Gerardo 7. Jason 8. Marissa 9. Anas 10. Harold 11. Calvin 12. Amy Hockey Baseball a. Suppose technology randomly selects the following values: 6, 2, 9. 4. 3, 5. Use this random sample to find the proportion of students who prefer hockey. LType an integer or a simplified fraction.) If your result is used to describe the sample, is this part of descriptive or inferential statistics? Explain. OA. Descriptive statistics because it uses tables, graphs, or calculations about a sample to draw conclusions about only the sample. O B. Descriptive statistics because it is using information from a sample to draw conclusions about the entire population. O C. Inferential statistics because it uses tables, graphs, or calculations about a…
A marketing manager for Nike purchased a 30 second time slot during the Super Bowl for advertising its new line of running clothes. The manager wants to determine if the commercial should be informative or funny. She pays for one informative and one funny commercial to be created. She recruits a sample of 100 volunteers and randomly assigns them to watch one of the two commercials and rates their interest in purchasing the clothes. Here are the results: Opinion Not interested Somewhat interested Very interested Informative 11 30 Ad Type Funny 36 19 Which of the following conditions for a test have not been met? O The data come from independent random samples or groups in a randomized experiment O More than one condition has not been met. O All of the conditions have been met. O All expected counts are at least 5. O The sample size is less than 10% of the population size. NEW FOR YOU: 40%
For a class project, a group of students were curious if there was a connection between color preferences and movie preferences (e.g., if people who liked brighter colors preferred uplifting/funny movies and people who liked darker colors liked dramas). Participants in the study were first asked them to select which color they most preferred, choosing between: red, blue, yellow, or green. Next, participants watched the movie Everything Everywhere All at Once and were asked to give it a rating between 0 and 100. Later, the students tested whether there was a difference in rating based on color preference. Which of the following analyses would BEST apply to this study?
- Attendance and Grades Read the following on attendance and grades, and answer the questions in the discussion board. A study conducted at Manatee Community College revealed that students who attended class 95 to 100% of the time usually received an A in the class. Students who attended class 80 to 90% of the time usually received a B or C in the class. Students who attended class less than 80% of the time usually received a D or an F or eventually withdrew from the class. Based on this information, attendance and grades are related. The more you attend class, the more likely you will receive a higher grade. If you improve your attendance, your grades will probably improve. Many factors affect your grade in a course. One factor that you have considerable control over is attendance. You can increase your opportunities for learning by attending class more often. a. What are the variables under study? b. Are descriptive, inferential, or both types of statistics used? c. What is the…
A random sample of 7 oak trees from two forests was gathered. The results are shown below. Height of Trees (feet) Forest A Forest B 70 92 78 82 84 66 83 76 78 72 88 79 77 85 Based on the samples, which statement best compares the height of the oak trees in each forest? O The oak trees in Forest A are generally taller and have less variabillity than the oak trees in Forest B. The oak trees in Forest A are generally shorter and have less variabillity than the oak trees in Forest B. O The oak trees in Forest A are generally taller and have more variabillity than the oak trees in Forest B. The oak trees in Forest A are generally shorter and have more variabillity than the oak trees in Forest B.
Topic: Inferential Statistics 1.
You conduct a study to determine whether men and women have different colour preferences when buying a new car. In a questionnaire, you ask respondents to indicate their sex (male/female) and which of four possible colours they would choose when buying a new car. You collect the following data: Male Female Total White 20 14 34 Blue 13 6 19 Red 10 21 31 Green 22 6 28 Total 65 47 112 You compute the test statistic and the result is 14.16 Test at the .01 level of significance whether this study has provided sufficient evidence that men and women have different colour preferences when buying a new car. (State your conclusion and explain how you arrived at that conclusion.)
(Using sets) In a study carried out with 260 university students, the following data was obtained: - 64 had taken a math course- 94 had taken a computer science course- 58 had taken a business administration course- 28 had taken a math course and a business administration course- 26 had taken a math course and a computer science course- 22 had taken a computer science course and a business administration course- 14 had taken all three types of courses a. How many students whose records were reviewed had not taken any of the three types of courses?b. Of the students whose records were studied, how many had taken only one computer science course?