PSYC 354: Quiz Two
Question 1
3 /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.
Question 2
3 /3 pts
A sample of scores has a mean of M = 20, a median of 28, and a mode of 29. What is the most
likely shape for the sample distribution?
symmetrical
positively skewed
cannot be determined from the information given
Question 3
3 /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.
False
, Question 4
3 /3 pts
If a positively skewed distribution has a mean of 40, then the median and the mode are probably
both greater than 40.
True
Question 5
0/ 3 pts
‘Which statement below is consistent with computing a weighted average of two individual
samples?
A computed weighted average will always be closer to the mean average of the larger sample
than the mean average of the smaller sample.
A computed weighted average will always be closer to the mean average of the smaller sample
than the mean average of the larger sample.
This cannot be determined from the information provided.
Question 6
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 medians or two modes.
Question 7
0/ 3 pts
Question 1
3 /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.
Question 2
3 /3 pts
A sample of scores has a mean of M = 20, a median of 28, and a mode of 29. What is the most
likely shape for the sample distribution?
symmetrical
positively skewed
cannot be determined from the information given
Question 3
3 /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.
False
, Question 4
3 /3 pts
If a positively skewed distribution has a mean of 40, then the median and the mode are probably
both greater than 40.
True
Question 5
0/ 3 pts
‘Which statement below is consistent with computing a weighted average of two individual
samples?
A computed weighted average will always be closer to the mean average of the larger sample
than the mean average of the smaller sample.
A computed weighted average will always be closer to the mean average of the smaller sample
than the mean average of the larger sample.
This cannot be determined from the information provided.
Question 6
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 medians or two modes.
Question 7
0/ 3 pts
