Question 1
3 / 3 pts
Which statement below is true?
It is possible for a distribution of scores to have two means.
It is possible for a distribution of scores to have two means or two medians.
It is possible for a distribution of scores to have two modes.
It is possible for a distribution of scores to have two medians or two modes.
Question 2
3 / 3 pts
An introductory to psychology professor has students report their major on the
first day of classes. Then, the professor decides to determine the major that is
most representative of the students in their class. Which measure of central
tendency should they utilize?
the mean
the median
the mode
the weighted average
IncorrectQuestion 3 (answer: true)
0 / 3 pts
For any distribution of sample scores, at least one individual will have a score
exactly equal to the mode.
True
False
Question 4
3 / 3 pts
For a severely skewed distribution, the mean often provides a better measure of
central tendency than the median or the mode.
True
False
IncorrectQuestion 5 (answer: true)
0 / 3 pts
Skewed distributions, open-ended distributions, or discrete variables are
situations for which the mean cannot be calculated or for which the mean may
not be the best measure of central tendency to utilize.
True
False
IncorrectQuestion 6 (this can not be determined)
0 / 3 pts
A sample has a mean of M = 50. If one new person is added to this sample, what
effect will this have on the sample mean?
The sample mean will increase.
The sample mean will decrease.
The sample mean will remain the same.
This cannot be determined from the information provided.
Question 7
3 / 3 pts
What is the preferred measure of central tendency for scores measured on an
ordinal scale?
the mean
the median
either the median or mean
the mode
Question 8
3 / 3 pts
Which of the following phrases is not consistent with central tendency as a
statistical measure?
average score
most typical score
spread of scores
middle score
Question 9
3 / 3 pts
It is possible for a distribution to have more than one median.
True
False
Question 10
3 / 3 pts
A population with a mean of µ = 9 has ΣX = 54. How many scores are in the
population?
N = 9
N = 7
N = 6
N = 14
Question 11
3 / 3 pts
The major mode in the distribution of scores below is X = 5.
True
False
Question 12
3 / 3 pts
A population of N = 6 scores has ΣX = 42. What is the population mean?
µ = 8
µ = 4
µ = 6
µ = 7
Question 13
3 / 3 pts
A distribution of scores has a mean of 51.5, a median of 51.2, and a mode of 51.
Based on this information, it appears that the distribution is symmetrical.
True
False
Question 14
3 / 3 pts
What is the value of the median for the following set of scores? Scores: 1, 4, 6, 7,
9, 15, 15, 16, 25, 30
11
8
12
15
