PSY 3213 Exam Common Questions with 100%
Verified Answers
The variance and standard deviation indicate how much the scores are spread out around -
✔✔the mean
Why shouldn't the mode be used with the following set of scores?
"2,5,3,3,4,2,4,5,1,1" - ✔✔There is no mode; all scores occur with the same frequency
The middlemost score in a skewed distribution is called the_______ - ✔✔Median
A graph of a frequency distribution shows the FREQUENCIES on the - ✔✔Y axis
Relative frequency is defined as the - ✔✔proportion of the total sample or population that
is made up of the score's frequency
In order to decide which measure of the central tendency is appropriate, you must first
determine - ✔✔the scale of measurement being used and the shape of the
distribution
The greater variability in a set of scores, - ✔✔the less accurately the scores are
represented by the mean
The_______ of a polygon above any score corresponds to that score's________ -
✔✔Height;Frequency
, When computing the variance, why do we square the deviations from the mean? -
✔✔To compensate for the fact that deviations about the mean always sum to zero
A frequency distribution that has no longer tail on one end or the other is called a:
- ✔✔Skewed distribution
To obtain the mean, we would - ✔✔add all the scores and divide by the total number
of scores
Which one of the following terms least belongs with the others? - ✔✔Y-Axis
The bars of a frequency histogram should - ✔✔All of these are TRUE
Which one of the following distributions is probably negatively skewed? - ✔✔scores on
a very easy test
In a normal distribution, the low-frequency, extreme scores located on the far left and far
right of the distribution are called the - ✔✔tails
A graphic that uses a dot to represent the frequency of each score connects those points with a
straight line is called a - ✔✔Frequency polygon
An advantage of the relative frequency over simple frequency is that - ✔✔relative
frequency is often easier to interpret than simple frequency
The distribution of salaries in the American population is not symmetrical. Most salaries are
bunched together at the lower end of the distribution. As salaries increase, there are fewer
and fewer people with these salaries. The shape of the graph produced by this distribution
would be - ✔✔Positively Skewed
Verified Answers
The variance and standard deviation indicate how much the scores are spread out around -
✔✔the mean
Why shouldn't the mode be used with the following set of scores?
"2,5,3,3,4,2,4,5,1,1" - ✔✔There is no mode; all scores occur with the same frequency
The middlemost score in a skewed distribution is called the_______ - ✔✔Median
A graph of a frequency distribution shows the FREQUENCIES on the - ✔✔Y axis
Relative frequency is defined as the - ✔✔proportion of the total sample or population that
is made up of the score's frequency
In order to decide which measure of the central tendency is appropriate, you must first
determine - ✔✔the scale of measurement being used and the shape of the
distribution
The greater variability in a set of scores, - ✔✔the less accurately the scores are
represented by the mean
The_______ of a polygon above any score corresponds to that score's________ -
✔✔Height;Frequency
, When computing the variance, why do we square the deviations from the mean? -
✔✔To compensate for the fact that deviations about the mean always sum to zero
A frequency distribution that has no longer tail on one end or the other is called a:
- ✔✔Skewed distribution
To obtain the mean, we would - ✔✔add all the scores and divide by the total number
of scores
Which one of the following terms least belongs with the others? - ✔✔Y-Axis
The bars of a frequency histogram should - ✔✔All of these are TRUE
Which one of the following distributions is probably negatively skewed? - ✔✔scores on
a very easy test
In a normal distribution, the low-frequency, extreme scores located on the far left and far
right of the distribution are called the - ✔✔tails
A graphic that uses a dot to represent the frequency of each score connects those points with a
straight line is called a - ✔✔Frequency polygon
An advantage of the relative frequency over simple frequency is that - ✔✔relative
frequency is often easier to interpret than simple frequency
The distribution of salaries in the American population is not symmetrical. Most salaries are
bunched together at the lower end of the distribution. As salaries increase, there are fewer
and fewer people with these salaries. The shape of the graph produced by this distribution
would be - ✔✔Positively Skewed
