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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...