Question 1
3 / 3 pts
A research study uncovers that college graduates have higher lifetime work
earnings than individuals who do not receive college degrees. This is an example
of a nonequivalent groups study.
True
False
Question 2
3 / 3 pts
Consider the distribution of exam scores for the first exam within a college
course. If the set of exam scores forms a symmetrical distribution, what can be
concluded about the students’ scores?
Most of the students had relatively high scores.
Most of the students had relatively low scores.
About an equal number of students had relatively high and relatively low scores.
A substantial number of students had very high scores and a substantial number
of students had very low scores.
Question 3
3 / 3 pts
A bar graph is constructed so that adjacent bars touch.
True
False
Question 4
3 / 3 pts
In general, more information is lost in a grouped frequency distribution table that
has class intervals with a width of 10 than a grouped frequency distribution table
that has class intervals with a width of 5.
True
False
Question 5
3 / 3 pts
The students in a psychology class seem to think that the midterm exam was
very difficult. If they are correct, what is the most likely shape for the distribution
of exam scores?
symmetrical
positively skewed
negatively skewed
normal
Question 6
3 / 3 pts
This grouped frequency distribution appropriately adheres to the guidelines
pertaining to creating grouped frequency distribution tables.
Xf
25-29 1
20-24 6
15-19 5
10-14 8
5-9 3
0-4 2
True
False
Question 7
3 / 3 pts
Which type(s) of frequency distribution graph(s) should be used for data that
come from an interval scale of measurement?
histograms or bar graphs
bar graphs
histograms or polygons
histograms, bar graphs, or polygons
Question 8
3 / 3 pts
After recording the final grade (A, B, C, D, F) for each individual in a class of N =
26 students, the professor would like to display the grade distribution in a
frequency distribution graph. Which kind of graph should be used?
bar graph
histogram
polygon
pie chart
Question 9
3 / 3 pts
No space is left between adjacent bars in a histogram.
True
False
Question 10
3 / 3 pts
Which of the following is a critical unique aspect of the experimental method
when examining the relationship between two variables?
manipulation of one variable
prediction of one variable
manipulation of two variables
prediction of two variables
Question 11
3 / 3 pts
Of the following options, which of the following is done first in the order of
operations?
squaring
division
addition
summation (Σ)
Question 12
3 / 3 pts
Students in an introductory art class are classified as art majors and non-art
majors. Which scale of measurement is being used to classify the students?
nominal
ordinal
interval
ratio
Question 13
3 / 3 pts
For the following distribution of quiz scores, how many individuals had a score
of X = 4?
Xf
6 1
5 6
4 4
3 4
2 2
1 2
4
2
5
6
Question 14
3 / 3 pts
What is the total number of scores for the distribution shown in the following
table?
Xf
4 7
3 5
2 4
1 2
4
10
18
39
Question 15
3 / 3 pts
For the following grouped frequency distribution table of exam scores, what is the
lowest score on the exam?
Xf
90-99 3
80-89 1
70-79 2
60-69 3
50-59 4
X = 70
X = 74
X = 90
Cannot be determined
Question 16
3 / 3 pts
What is the value of ΣX2 for the scores 2, 4, and 5?
11
45
36
33
Question 17
3 / 3 pts
For the following grouped frequency distribution table of exam scores, how many
students had scores higher than X = 54?
Xf
60-64 3
55-59 4
50-54 5
45-49 2
40-44 1
7
12
8
3
Question 18
3 / 3 pts
For the following frequency distribution of quiz scores, how many individuals took
the quiz?
Xf
5 6
4 5
3 5
2 3
1 2
5
21
15
14
Question 19
3 / 3 pts
Using the frequency distribution table below, what is the proportion of individuals
that scored a 4?
Xf
6 4
5 3
4 7
3 2
2 2
1 2
.2
