1.
A study is conducted on students. Several variables are recorded. Identify each variable as
nominal, ordinal, interval, ratio measurement scale.
A)
Type of car the student owns.
B)
Number of credit hours taken during that semester.
C)
The time the student waited in line at the bookstore to pay for his/her textbooks.
D)
Home state of the student.
E)
SES (Social Economic Status) of the parents
F)
Score on a motivation test (lowest score 1, highest score 10)
Answer:
A) nominal, B) ratio, C) ratio, D) nominal, E) ordinal, F) interval
Use the following to answer questions 2–4:
In a group of 136 students it is recorded how much money each student has in their possession
at that time. The histogram shown below represents the collected data:
2.
What is approximately the percentage of students with under $20.00 in their possession?
A)
26%
C)
74%
B)
30%
D)
90%
Answer:
C
3.
Which of the following description(s) is/are correct regarding the shape of the histogram?
A)
Skewed right
D)
An outlier is present.
B)
Skewed left
E)
Unimodal
C)
Symmetric
F)
Bimodal
Answer:
A, D, E
4.
What is approximately the number of students with less than $50.00 in their possession?
A)
Less than 5
C)
About 30
B)
About 10
D)
More than 100
Answer:
D
Use the following to answer questions 5–6:
The table below represents the mean number of reported malaria cases (between 1996 and
2006) for each of 10 West African countries as published in the journal Statistica Neerlandica.
Country
Benin
Burkina Faso
Cote
d’Ivoire
The Gambia
Ghana
Liberia
Mali
Senegal
Sierra Leone
Togo
Mean number of
reported malaria
cases
745,340
1,098,680
1,203,705
229,505
2,956,957
613,171
691,245
1,111,249
321,340
453,837
5.
What is the best method to display these data?
A)
Histogram
B)
Pie chart
C)
Bar graph
D)
Stem-and-leaf plot
Answer:
C
6.
Why is it not appropriate to use a histogram to display these data?
A)
A pie chart is much easier to read
B)
The data are categorical and therefore a histogram is not appropriate
C)
The width of the bins would be too large to display a histogram
D)
None of the above
Answer:
B