Quiz_ Module 3 Homework

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2/8/24, 3:18 PM Quiz: Module 3 Homework https://canvas.nd.edu/courses/90705/quizzes/48132/take?preview=1 1/5 Module 3 Homework  This is a preview of the published version of the quiz Started: Feb 8 at 3:18pm Quiz Instructions Use the following information to answer questions 1 through 3. A local corporation was interested in the purchasing habits of Wake County residents. Specifically, one of the things they were interested in was the proportion of residents that did a major home improvement project last year. The corporation used a list of all households to take a simple random sample of households. The researcher then visited each of the sample homes and found that 21 of 100 homes had completed a major home improvement project. 2 pts Question 1 Which of the following best describes the parameter of interest? All Wake County residents 21% The 100 homes that were sampled. The proportion of residents that did a major home improvement project in the last year 2 pts Question 2

2/8/24, 3:18 PM Quiz: Module 3 Homework https://canvas.nd.edu/courses/90705/quizzes/48132/take?preview=1 2/5 Which of the following best describes the population of interest? All Americans The 100 homes that were sampled All Wake County residents All Wake County residents who had completed a major home improvement project 2 pts Question 3 Which of the following best describes the sample? The 21 homes that completed a home improvement project in the last year The 100 randomly selected homes All Wake county residents 0.21 2 pts Question 4 Online web surveys, advertised through popups, are a popular way to obtain survey data. Which of the following are true about such surveys? Select all that apply. These are an example of volunteer response sampling. These are an example of a stratified sample. The responses will likely suffer from response bias.

2/8/24, 3:18 PM Quiz: Module 3 Homework https://canvas.nd.edu/courses/90705/quizzes/48132/take?preview=1 3/5 The information that is reported often reflects the opinions of those that have a strong feeling about the topic. These are an example of a cluster sampling. 3 pts Question 5 A professor wanted to determine the proportion of students in his class who have cheated on an exam. The professor selects a random sample of 30 students from his class and emails them the question "Have you ever cheated on an exam?" He receives responses from only 10 of the 30 students. Which of the following statements are true? Select all that apply. This study would suffer from under coverage because the professor should have selected a sample from the entire student body of the university. This study suffers from response bias since students will not want to tell a professor whether or not they have cheated. The professor could make the survey anonymous to improve the quality of data that is received. The study should not suffer from any bias since it was based on a random sample of all of the professor's students. This study suffers from non-response bias because only 33% of the people surveyed provided a response. 2 pts Question 6 What is the ultimate goal in statistics? To determine the value of a parameter though sampling and estimation. To calculate the value of sample statistics and make graphs of data. To take random samples of data.

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2/8/24, 3:18 PM Quiz: Module 3 Homework https://canvas.nd.edu/courses/90705/quizzes/48132/take?preview=1 4/5 To torture college students. 3 pts Question 7 College administrators are trying to determine if the food choices on campus, outside of the dining hall, are reasonably priced for students. They emailed all students once, and asked them to respond to an anonymous survey, but they have had a very low response rate. Which of the following statements are true? Select all that apply. This study likely suffers from undercoverage. The administrators should continue to email the students until more students respond. This study likely suffers from non-response bias. The administrators should consider other ways to advertise the survey such as in person or on digital bulletin boards. The administrators should offer a $100 GrubHub gift card as incentive. Any student that responds to the survey will be entered into a raffle to win it. This studying likely suffers from response bias. 2 pts Question 8 The list of units from which a sample is selected is called The sampling frame Inference The population The sample

2/8/24, 3:18 PM Quiz: Module 3 Homework https://canvas.nd.edu/courses/90705/quizzes/48132/take?preview=1 5/5 Not saved 2 pts Question 9 Suppose we wish to survey several undergraduate students who live on campus at Notre Dame. To do this, we divide the students by dorm and randomly select 8 per dorm. Which type of sampling method would we be using? Systematic Random Sample Cluster Sampling Simple Random Sample Stratified Random Sample Submit Quiz

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