PSY 3213 Exam Common Questions with 100% Verified
Answers
The distinguishing characteristic of the frequency polygon is that - ✔✔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: - ✔✔normal curve
Which of the following z scores represent(s) the most extreme value in a distribution of scores
assuming they are normally distributed? - ✔✔-3.12
The range is the descriptive statistic that indicates the - ✔✔distance between the two most
extreme scores
When graphing the frequencies of weights of males and females in the class, a _______ should
be used. - ✔✔Frequency Histogram
Measures of variability are used to - ✔✔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 - ✔✔X axis
Measures of central tendency are measures of - ✔✔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, there are fewer and fewer newborns with these weights. The shape of the graph
produced by this distribution would be - ✔✔negatively skewed
, When a distribution's mode=median=mean, it is said to be - ✔✔Symmetrical
The mean is the preferred measure of central tendency when - ✔✔the distribution is
approximately symmetrical and the scale of measurement is interval or ratio
The term variability is most opposite to - ✔✔Consistency
In a normal curve, the proportion of the area under the curve between two scores represents -
✔✔the relative frequency of all scores between the two scores
The mode is defined as - ✔✔The most frequently occurring score
One benefit to using a frequency distribution table or graph is that it makes it easier to -
✔✔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? - ✔✔the median
Why is the distribution median unaffected by extreme scores occurring in only one tail of the
distribution? - ✔✔Because the median ignores the mathematical values of the scores
Find the mode of the following data set:
"8,7,2,4,4,8,2,4,6,5,7,3,9,4,5,4,7" - ✔✔4
In a frequency table, the rows indicate - ✔✔frequency of all possible scores
To obtain the relative frequency, we would - ✔✔divide the frequency for a score by the total
number of scores
Answers
The distinguishing characteristic of the frequency polygon is that - ✔✔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: - ✔✔normal curve
Which of the following z scores represent(s) the most extreme value in a distribution of scores
assuming they are normally distributed? - ✔✔-3.12
The range is the descriptive statistic that indicates the - ✔✔distance between the two most
extreme scores
When graphing the frequencies of weights of males and females in the class, a _______ should
be used. - ✔✔Frequency Histogram
Measures of variability are used to - ✔✔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 - ✔✔X axis
Measures of central tendency are measures of - ✔✔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, there are fewer and fewer newborns with these weights. The shape of the graph
produced by this distribution would be - ✔✔negatively skewed
, When a distribution's mode=median=mean, it is said to be - ✔✔Symmetrical
The mean is the preferred measure of central tendency when - ✔✔the distribution is
approximately symmetrical and the scale of measurement is interval or ratio
The term variability is most opposite to - ✔✔Consistency
In a normal curve, the proportion of the area under the curve between two scores represents -
✔✔the relative frequency of all scores between the two scores
The mode is defined as - ✔✔The most frequently occurring score
One benefit to using a frequency distribution table or graph is that it makes it easier to -
✔✔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? - ✔✔the median
Why is the distribution median unaffected by extreme scores occurring in only one tail of the
distribution? - ✔✔Because the median ignores the mathematical values of the scores
Find the mode of the following data set:
"8,7,2,4,4,8,2,4,6,5,7,3,9,4,5,4,7" - ✔✔4
In a frequency table, the rows indicate - ✔✔frequency of all possible scores
To obtain the relative frequency, we would - ✔✔divide the frequency for a score by the total
number of scores
