Quiz: Introduction to Statistics, Frequency Tables, and
Graphs
Due Oct 30 at 11:59pm Points 60 Questions 20 Time Limit 60 Minutes
Instructions
Attempt History
Attempt Time Score
LATEST Attempt 1 24 minutes 57 out of 60
Correct answers are hidden.
Score for this quiz: 57 out of 60
Submitted Oct 30 at 7:38pm
This attempt took 24 minutes.
The quiz:
Covers the Textbookmaterial from Module 1: Week 1.
Contains 20 multiple-choice and true/falsequestions.
Is limited to 60 minutes.
Allows 1 attempt.
Is worth 60 points.
Submit this assignment by 11:59 p.m. (ET) on Monday of Module 1: Week 1.
3 / 3 pts
Question 1
Sarah is conducting a research study in which one group of participants
consume one cup of coffee, whereas another group of participants
consume two cups of coffee. Then, she assesses attention levels of these
participants following coffee consumption. This is an example of a(n) _____
research study.
descriptive
correlational
Sign In
quasi-experimental
experimental
3 / 3 pts
Question 2
A data set is described as consisting of N = 15 scores. Based on the
notation being used, the data set is a sample and contains data from a
subset of the population.
True
False
3 / 3 pts
Question 3
Barbara is a psychologist who measures relationship satisfaction among
couples by observing non-verbal behavior (e.g., smiling, mimicking partner
actions). In this example, non-verbal behavior is an example of a(n) _____.
discrete variable.
operational denition.
construct.
real limits.
3 / 3 pts
Question 4
A group of quiz scores ranges from 3 to 10, but no student had a score of X
= 7. If the scores are put in a frequency distribution table, X = 7 would not
be listed in the X column.
True
False
3 / 3 pts
Question 5
A researcher uses an anonymous survey to investigate the television-
viewing habits of 100 American adolescents. The researcher plans to make
an inference about the television-viewing habits of all American
adolescents based on the results of the survey. The entire group of
American adolescents is an example of a _____.
sample.
statistic.
population.
parameter.
3 / 3 pts
Question 6
If a set of scores for a variable is displayed in a frequency distribution
polygon, which scale of measurement was used to measure the variable?
nominal or ordinal
ordinal or interval
ratio or ordinal
interval or ratio
0 / 3 pts
Question 7
Incorrect
Incorrect
Smooth curves and relative frequencies are more often used to describe
population than sample data.
True
False
3 / 3 pts
Question 8
To determine the size of a difference between two individuals on a
measured variable, a researcher must use either an interval or a ratio scale
of measurement.
True
False
3 / 3 pts
Question 9
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
3 / 3 pts
Question 10
Lauren is a psychologist interested in whether observing helpful actions
while consuming media causes greater future helping behavior. She
designs a research study in which one group of participants watch a
pleasant television show depicting people helping others for 20 minutes,
whereas a second group of participants watch a pleasant television show
for 20 minutes where no helping behavior takes place. After watching the
show assigned to them, participants in each group are then provided the
opportunity to help another student who drops a folder of papers, and
Lauren records whether each participant helps this other student or not. In
this research study, the control condition is _____.
the group of participants who watch the pleasant television show for 20
minutes where no helping behavior takes place.
the group of participants who watch the pleasant television show for 20
minutes where helping behavior takes place.
the participants that help the student who drops the folder of papers.
the participants that do not help the student who drops the folder of papers.
3 / 3 pts
Question 11
A recent study uncovered a correlation between gum disease and heart
disease. This result indicates that gum disease causes individuals to
develop heart disease.
True
False
3 / 3 pts
Question 12
If a set of scores is displayed using a smooth curve, which scale of
measurement was used to measure the scores?
nominal
interval
nominal or ordinal
interval or ratio
3 / 3 pts
Question 13
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
.7
.35
.1
3 / 3 pts
Question 14
How many individual scores are in the following distribution?
N = 5
N = 6
N = 10
N = 4
3 / 3 pts
Question 15
What is the value of ΣX for the scores 2, 4, and 5?
2
11
45
36
33
3 / 3 pts
Question 16
For the data in the following table, what is the value of ΣX?
Xf
4 1
3 0
2 2
1 1
4
9
10
13
3 / 3 pts
Question 17
For the following data, N = _____.
Xf
4 2
3 3
2 1
1 2
8.
10.
20.
18.
3 / 3 pts
Question 18
In a grouped frequency distribution table, one interval is listed as 35-39. If
the scores represent a continuous variable, what are the real limits for this
interval?
34.5 and 39.5
35.5 and 39.5
34 and 40
35.25 and 39.25
3 / 3 pts
Question 19
If the following grouped frequency distribution table pertaining to a
continuous variable were shown in a histogram, the width of the bar above
the 15-19 interval would reach from _____ to _____.
Xf
20-24 2
15-19 5
10-14 4
5-9 1
X = 14.5 to X = 19.5
X = 15.5 to X = 18.5
X = 15.5 to X = 19.5
X = 15.0 to X = 19.0
3 / 3 pts
Question 20
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
Quiz Score: 57 out of 60
