MI 355 University of Waterloo Statistical Tests Questions

User Generated

SP23FQP

Mathematics

MI 355

University of Waterloo

MI

Description

need someone help me with this test, needs at 90%+, see attachment for detail

Unformatted Attachment Preview

MI355 Spring 2021 Exam 2 (126 points in Total + 16 bonus points) 1 Name: ___________________________ PID ___________________ 1. Which one of the following represents a positively skewed distribution? (4 points) a. b. c. d. Answer: ____ Please answer Q2 and Q3 based on the following scenario (5 points each, 10 points in total). You are conducting a study on college students’ knowledge of current international political issues. You collect data on three main variables: 1. college students’ familiarity with current international political issues [Familiarity], 2. the time they spend surfing the Internet [Time], and 3. their interest in politics in general [Interest]. You want to test the following two hypotheses: a: The more time college students spend surfing the Internet, the more are they familiar with current international political issues. b: There is a relationship between college students’ interest in politics in general and their time spent on surfing the Internet. To measure the time people spend surfing the Internet, you asked them how many hours spend surfing the Internet every week on average. You measured students’ interest in politics using a 5-point Likert scale question asking people’s response to the following statement, “I am interested in politics” with 1 meaning strongly disagree and 5 meaning strongly agree. You assume that this 5-point Likert scale is an interval level of measurement. You measured students’ familiarity with current international political issues by giving them a short quiz on current affairs and you graded the quiz and categorize them as ‘excellent’, ‘good’, ‘mediocre’, and ‘poor’, You assume the familiarity measure to be ordinal level. 2. To test the first hypothesis “The more time college students spend surfing the Internet, the more are their familiar with current international political issues”, you will use a. Person’s r correlation test b. Spearmans’ rho correlation test c. T-test d. Chi-square test MI355 Spring 2021 Exam 2 (126 points in Total + 16 bonus points) 2 Answer: ____ 3. To test the second hypothesis: “there is a relationship between college students’ interest in politics and their time spend surfing the Internet every week”, you will use a. Person’s r correlation test b. Spearmans’ rho correlation test c. T-test d. Chi-square test Answer: ____ 4. (8 points) You want to conduct an experimental study to see how two variables influence people’s enjoyment of a violent TV show. These two variables you have in mind are: personality (sensation seeker or non-sensation seeker), and screen size of the TV (60 inch or 19 inch). You hypothesize that people who watch the show on the bigger screen will enjoy the violent show more than people who watch it on the smaller screen and people who are sensation seekers will enjoy the violent show more than non-sensation seekers. Please list all the experimental conditions in this study. 5. Some researchers want to conduct a survey on political opinions. They have designed a survey (shown below). Pick at least 4 survey questions that are problematic. For each survey question, identify what the problem is, and explain the problem. For example, it is not enough to say that a question is unclear. You have to explain exactly what is unclear about the question (2 points per problem). For each problem, suggest how the problem can be corrected (2 points per problem). There are more than 4 problems in this survey questionnaire. You can earn up to 16 bonus points for this assignment. (16 points in total plus up to 16 bonus points) Instructions: We are conducting a survey on political issues. Please complete the survey. 1. What is your annual income? ______________________ 2. The Democrat proposal for Social Security is financially responsible and compassionate. Strongly disagree Disagree Neutral Agree Strongly agree 3. What is your political affiliation? Democrat Republican MI355 Spring 2021 Exam 2 (126 points in Total + 16 bonus points) 4. Don’t you agree that less of your hard-earned money should be taxed to support lazy welfare recipients? Strongly disagree Disagree Neutral Agree Strongly agree 5. Which candidates did you vote for in the local, state, and national elections? ______________________________________________________________________ 6. I watch the news coverage of political issues regularly. Strongly disagree Disagree Neutral Agree Strongly agree 7. What do you like best about the elections? ______________________________________________________________________ 8. How many times in the past year have you talked to a friend about the elections? _____________________________________________________________________ Problem 1: Suggested correction 1: Problem 2: Suggested correction 2: Problem 3: Suggested correction 3: 3 MI355 Spring 2021 Exam 2 (126 points in Total + 16 bonus points) Problem 4: Suggested correction 4: Bonus points opportunity Problem 5: Suggested correction 5: Problem 6: Suggested correction 6: Problem 7: Suggested correction 7: Problem 8: Suggested correction 8: 4 MI355 Spring 2021 Exam 2 (126 points in Total + 16 bonus points) 5 6. A study samples 100 female students in CAS and asks them to indicate which brand of jeans is their favorite brand. The following code scheme is used. 1 = Levi’s 2 = Abercrombie & Fitch 3 = Banana Republic 4 = Von Dutch 5 = Diesel 6 = Seven of All Mankind 7 = Paper Denim & Cloth 8 = Juicy Couture 9 = Other One of the study’s researchers, Jill, thinks that the mode is the most appropriate measure of central tendency to describe this data. Another researcher, Anne, disagrees and thinks that the mean is the most appropriate measure of central tendency for this data. 6a. Is Jill or Anne correct? Or are they both wrong? (3 points) 6b. Explain fully your decision above. (3 points) 7. You are a management consultant specializing in employee satisfaction. Recently, Hilton Hotel hired you and your firm to see if employee satisfaction is related to employee absenteeism. You surveyed 500 Hilton employees. You used an established employee satisfaction survey, with a final score ranging from 1 to 10 (high scores indicating high satisfaction). You also measured absenteeism by the number of workdays missed per year, and obtained that information for each employee surveyed. MI355 Spring 2021 Exam 2 (126 points in Total + 16 bonus points) 6 Part of the analysis output is given below: Descriptive Statistics Satisfaction Workdays missed Mean Std. Deviation 5.78 2.39 7.34 7.88 N 500 500 Correlations Satisfaction Satisfaction Workdays missed Correlation Sig. (p-value) N Correlation Sig. (p-value) N Workdays missed 1.00 . 500 -.500 .026 500 -.500 .026 500 1.00 . 500 7a. Set up the null hypothesis (3 points) and alternative hypothesis (3 points). 7b. Do you reject or accept the null hypothesis? (3points) Why? (3 points) 8. In a survey of 10 students, you asked them about their age. Here is the data you got: 19, 20, 20, 21, 23, 18, 17, 17, 17, 19 8a. What are the mode, median, mean, and range of these numbers? (2.5 points for each, 10 points in total) MI355 Spring 2021 Exam 2 (126 points in Total + 16 bonus points) 7 8b. What are the skewness score (3 points) and Kurtosis scores (3 points) of this dataset? Are the data normally distributed (2 points)? Why? (2 points) 9. Please identify the appropriate t-test for the following scenarios (15 points in total). 9a. Professor Peng measured MI355 students’ statistical knowledge using the same exam at the beginning of week 12 and at the end of week 13 after the statistical lectures. Professor Peng wanted to see whether the students’ statistical knowledge improved. Which t-test should Professor Peng use? (5 points) 9b. Professor Peng wanted to compare whether there is any difference in the statistical exam scores between MI355 students who watched the d2l recorded lectures and students who did not watch them. Which t-test should Professor Peng use? (5 points) 9c. Professor Peng wanted to test whether recorded lectures are effective. She needed to compare the scores of the statistical test of MI355 students with the benchmark score of 85%. Which t-test should Professor Peng use? (5 points) 10. (5 points) If a researcher discovers a positive correlation between the amount of cheese people eat and their income level, you know that: a. eating cheese decreases your income b. eating cheese increases your income c. beyond correlations, the relationship between the two factors is unknown. d. people who are more disposable income tend to consume more cheese. MI355 Spring 2021 Exam 2 (126 points in Total + 16 bonus points) 8 Answer: ____ 11. (5 points) This survey administration mode allows for a probability sample, low-cost, and can be administered by a small team of people. However, response rates tend to be low and data collection tends to be slow. Which technique is this? a. Mail b. Telephone c. Face to face d. Web-based Answer: ____ 12. (5 points) Suppose that you wanted to assess how “generation x” is portrayed in newspapers, your choice of research design would be a(n) a. b. c. d. survey research design. content analysis design. experimental research design. quasi experimental research design. Answer: ____ 13. (5 points) A study design is represented by the following notation: R Group 1 R Group 2 X M1 M2 X represents treatment M represents measurement R represents random assignment What is this study design called? a. Pretest posttest control group design b. Posttest only control group design c. Solomon Four-group Design d. None of the above Answer: ____ 14. (5 points) Alternative explanations for the results of an experiment are called a. confounding variable b. contradictory arguments c. disparate measures MI355 Spring 2021 Exam 2 (126 points in Total + 16 bonus points) d. opposing opinions e. unexpected tangents Answer: ____ 15. (5 points) Suppose that you want to make claims about the cause and effect relationship between variables. Which research design is best suited for that purpose? a. Survey design b. Content analysis design c. Experimental design d. Qualitative method Answer: ____ 16. (5 points) Which of the following populations or universe is (are) appropriate for sampling for a content analysis of media portrayal of young adults? a. Young adults b. College students c. Magazine article Answer: ____ 9
Purchase answer to see full attachment
User generated content is uploaded by users for the purposes of learning and should be used following Studypool's honor code & terms of service.

Explanation & Answer

View attached explanation and answer. Let me know if you have any questions.

MI355 Spring 2021
Exam 2 (126 points in Total + 16 bonus points)

1

Name: ___________________________ PID ___________________
1. Which one of the following represents a positively skewed distribution? (4 points)
a.
b.

c.

d.

Answer: __B__
Please answer Q2 and Q3 based on the following scenario (5 points each, 10 points in total).
You are conducting a study on college students’ knowledge of current international political
issues. You collect data on three main variables: 1. college students’ familiarity with current
international political issues [Familiarity], 2. the time they spend surfing the Internet [Time],
and 3. their interest in politics in general [Interest]. You want to test the following two
hypotheses:
a: The more time college students spend surfing the Internet, the more are they familiar with
current international political issues.
b: There is a relationship between college students’ interest in politics in general and their
time spent on surfing the Internet.
To measure the time people spend surfing the Internet, you asked them how many hours
spend surfing the Internet every week on average. You measured students’ interest in politics
using a 5-point Likert scale question asking people’s response to the following statement, “I
am interested in politics” with 1 meaning strongly disagree and 5 meaning strongly agree.
You assume that this 5-point Likert scale is an interval level of measurement. You measured
students’ familiarity with current international political issues by giving them a short quiz on
current affairs and you graded the quiz and categorize them as ‘excellent’, ‘good’,
‘mediocre’, and ‘poor’, You assume the familiarity measure to be ordinal level.
2. To test the first hypothesis “The more time college students spend surfing the Internet, the
more are their familiar with current international political issues”, you will use
a. Person’s r correlation test
b. Spearmans’ rho correlation test
c. T-test
d. Chi-square test

MI355 Spring 2021
Exam 2 (126 points in Total + 16 bonus points)

2

Answer: ____
3. To test the second hypothesis: “there is a relationship between college students’ interest in
politics and their time spend surfing the Internet every week”, you will use
a. Person’s r correlation test
b. Spearmans’ rho correlation test
c. T-test
d. Chi-square test
Answer: ____
4. (8 points) You want to conduct an experimental study to see how two variables influence
people’s enjoyment of a violent TV show. These two variables you have in mind are:
personality (sensation seeker or non-sensation seeker), and screen size of the TV (60 inch or
19 inch). You hypothesize that people who watch the show on the bigger screen will e...


Anonymous
Great! Studypool always delivers quality work.

Studypool
4.7
Trustpilot
4.5
Sitejabber
4.4

Related Tags