MAT 202 LEVELS OF MEASUREMENT

LEVELS OF MEASUREMENT
Step 1 of 1
Questions 1­5 are related to the following information:

At the beginning of the semester, an Intro to Statistics instructor asked the 225 students enrolled in the
class to complete a survey. For each student, the instructor collects information about the following:

Sport (Favorite sport: Football, Baseball, Basketball, Hockey, Other)

Exercise (How many minutes do you spend exercising per week)

Personality (on a 0­25 scale, how would you describe your personality 0=total introvert, 25=total extrovert)

Death penalty (Strongly agree, Agree, Neutral, Disagree, Strongly Disagree)

Question 1 of 6Points: 10 out of 10
What are the individuals in this example?


The course instructor


Sport, Exercise, Personality, and Death penalty


The students enrolled in Intro to Statistics
Correct. Individuals are the people/objects that information is collected on.
Therefore, in this case, the individuals are the 225 students enrolled in the
Intro to Statistics course.
Question 2 of 6Points: 10 out of 10
How many variables are in this example?


225


4


900
Correct. The variables are the characteristics/pieces of information that are
collected on the individuals. In this case, there are therefore 4 variables:
Sport, Exercise, Personality, and Death penalty.

,Question 3 of 6Points: 10 out of 10
Which of the variables above is ordinal?


Personality


Exercise


Death penalty


Sport
Correct. In this example, Death penalty is an ordinal variable since the
possible values are naturally ordered from strong agreement to strong
disagreement.
Question 4 of 6Points: 10 out of 10
What kind of variable is Personality?


Interval


Ratio


Nominal


Ordinal
Correct. Personality is an interval variable since the value of 0 does not mean
“no personality” but rather it means total introvert.
Question 5 of 6Points: 10 out of 10
What kind of variable is Sport?


Ratio


Ordinal

,Nominal


Interval
Correct. Sport is a categorical variable where the possible values do not have
a natural order and therefore it is nominal.
Question 6 of 6Points: 10 out of 10
Which of the following variables is not a ratio variable?


Internet (How much minutes/day do you spend on the Internet?)


Text messages (How many text messages you send a day)


Temperature (Outside temperature)


Charity (How much money do you donate to charity in a year)
Correct. Temperature is an interval variable. Temperature = 0 does not mean
that “there is no temperature” (in fact, there is no such thing). Temperature = 0
means that it is very cold that day.



EXAMINING DISTRIBUTIONS CHECKPOINT 1
Step 1 of 1
The following 5 questions relate to the same histogram, shown below.

Question 1 of 6Points: 10 out of 10
This histogram shows the distribution of times, in minutes, required for 25 rats
in an animal behavior experiment to navigate a maze successfully.

, What percentage of the rats navigated the maze in less than 5.5 minutes?
21%


60%


68%


70%


84%


Good job! From the histogram we can find that 3 + 8 + 6 + 4 = 21 out of the 25
rats fall below 5.5 minutes (first four bars). Since the question asks about the
percentage of observations, the answer is 21/25 * 100 = 84%.
Question 2 of 6Points: 10 out of 10