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EXAM #3-PSY3213 Questions and
Correct Answers/ Latest Update /
Already Graded
The distinguishing characteristic of the frequency polygon is that
Ans: the graph is created by connecting the dots with straight lines
A bell-shaped curve that happens to describe many frequency
distributions that occur in nature is called a:
Ans: normal curve
Which of the following z scores represent(s) the most extreme value
in a distribution of scores assuming they are normally distributed?
Ans: -3.12
The range is the descriptive statistic that indicates the
Ans: distance between the two most extreme scores
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When graphing the frequencies of weights of males and females in
the class, a _______ should be used.
Ans: Frequency Histogram
Measures of variability are used to
Ans: describe to the extent in which scores in a distribution differ from one
another
A graph of a frequency distribution shows the scores on the
Ans: X axis
Measures of central tendency are measures of
Ans: location
The distribution of weights of newborn infants in the American
population is non symmetrical. Most weights are bunched together
towards the upper end of the distribution. As weights decrease,
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there are fewer and fewer newborns with these weights. The shape
of the graph produced by this distribution would be
Ans: negatively skewed
When a distribution's mode=median=mean, it is said to be
Ans: Symmetrical
The mean is the preferred measure of central tendency when
Ans: the distribution is approximately symmetrical and the scale of
measurement is interval or ratio
The term variability is most opposite to
Ans: Consistency
In a normal curve, the proportion of the area under the curve
between two scores represents
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Ans: the relative frequency of all scores between the two scores
The mode is defined as
Ans: The most frequently occurring score
One benefit to using a frequency distribution table or graph is that it
makes it easier to
Ans: see what scores occurred and how they often occurred
Which measure of central tendency is most appropriate if the shape
of the distribution is severely skewed?
Ans: the median
Why is the distribution median unaffected by extreme scores
occurring in only one tail of the distribution?
Ans: Because the median ignores the mathematical values of the scores
EXAM #3-PSY3213 Questions and
Correct Answers/ Latest Update /
Already Graded
The distinguishing characteristic of the frequency polygon is that
Ans: the graph is created by connecting the dots with straight lines
A bell-shaped curve that happens to describe many frequency
distributions that occur in nature is called a:
Ans: normal curve
Which of the following z scores represent(s) the most extreme value
in a distribution of scores assuming they are normally distributed?
Ans: -3.12
The range is the descriptive statistic that indicates the
Ans: distance between the two most extreme scores
,2 | Page
When graphing the frequencies of weights of males and females in
the class, a _______ should be used.
Ans: Frequency Histogram
Measures of variability are used to
Ans: describe to the extent in which scores in a distribution differ from one
another
A graph of a frequency distribution shows the scores on the
Ans: X axis
Measures of central tendency are measures of
Ans: location
The distribution of weights of newborn infants in the American
population is non symmetrical. Most weights are bunched together
towards the upper end of the distribution. As weights decrease,
,3 | Page
there are fewer and fewer newborns with these weights. The shape
of the graph produced by this distribution would be
Ans: negatively skewed
When a distribution's mode=median=mean, it is said to be
Ans: Symmetrical
The mean is the preferred measure of central tendency when
Ans: the distribution is approximately symmetrical and the scale of
measurement is interval or ratio
The term variability is most opposite to
Ans: Consistency
In a normal curve, the proportion of the area under the curve
between two scores represents
, 4 | Page
Ans: the relative frequency of all scores between the two scores
The mode is defined as
Ans: The most frequently occurring score
One benefit to using a frequency distribution table or graph is that it
makes it easier to
Ans: see what scores occurred and how they often occurred
Which measure of central tendency is most appropriate if the shape
of the distribution is severely skewed?
Ans: the median
Why is the distribution median unaffected by extreme scores
occurring in only one tail of the distribution?
Ans: Because the median ignores the mathematical values of the scores
