Descriptive Statistics Exam prep &
answers
Match the data characteristic to what it describes.
Center:
Variability:
Shape:
(symmetrical or skewed)
(spread of data values or dispersion)
(Typical or middle value; where the data values are concentrated) - correct answersCenter: Typical or
middle value; where the data values are concentrated.
Variability: spread of data values or dispersion.
Shape: symmetrical or skewed.
The best measure of central location when using an attribute data set is the ___.
median.
mode.
mean. - correct answersmode
The mean is the balancing point because it has the property that distances from the mean to the data
points always sum to _______ - correct answerszero
For the data set 4, 5, 6, and 9, the arithmetic mean is
a) 6.5.
b) 5.5.
c) 6.
d) 7. - correct answers6.
The measure of central location that can best be labeled as the midpoint of the data set is the
___________. - correct answersmedian
, Numbers that summarize a sample of data are called ________ and numbers that summarize
populations are called _________. - correct answers1. statistics
2. parameters
Which measure of center is the most frequently occurring value?
a) mode.
b) median.
c) mean. - correct answersmode.
The best measure of central location for a numerical data set when the data set contains outliers is the
___________. (Enter one word in the blank.) - correct answersmedian
The arithmetic mean is the average of a data set.
True.
False. - correct answersTrue.
When a data set is symmetrical, the mean and median are approximately the ___________ . (Please
enter one word in the blank.) - correct answersequal
To calculate the arithmetic mean
all the data points, except outliers must be added together, then divided by the number of data points.
all the data points are multiplied together, then divided by the number of data points.
all of the data points must be added together, then divided by the number of data points.
the most frequently occurring data point is selected. - correct answersall of the data points must be
added together, then divided by the number of data points.
The ___________ mean is the multiplicative average of a data set. - correct answersgeometric
The measure of center where half the values of the data set lie above this measure and half the values
of the data set lie below this measure is known as the
mean.
outlier.
median.
mode. - correct answersmedian
answers
Match the data characteristic to what it describes.
Center:
Variability:
Shape:
(symmetrical or skewed)
(spread of data values or dispersion)
(Typical or middle value; where the data values are concentrated) - correct answersCenter: Typical or
middle value; where the data values are concentrated.
Variability: spread of data values or dispersion.
Shape: symmetrical or skewed.
The best measure of central location when using an attribute data set is the ___.
median.
mode.
mean. - correct answersmode
The mean is the balancing point because it has the property that distances from the mean to the data
points always sum to _______ - correct answerszero
For the data set 4, 5, 6, and 9, the arithmetic mean is
a) 6.5.
b) 5.5.
c) 6.
d) 7. - correct answers6.
The measure of central location that can best be labeled as the midpoint of the data set is the
___________. - correct answersmedian
, Numbers that summarize a sample of data are called ________ and numbers that summarize
populations are called _________. - correct answers1. statistics
2. parameters
Which measure of center is the most frequently occurring value?
a) mode.
b) median.
c) mean. - correct answersmode.
The best measure of central location for a numerical data set when the data set contains outliers is the
___________. (Enter one word in the blank.) - correct answersmedian
The arithmetic mean is the average of a data set.
True.
False. - correct answersTrue.
When a data set is symmetrical, the mean and median are approximately the ___________ . (Please
enter one word in the blank.) - correct answersequal
To calculate the arithmetic mean
all the data points, except outliers must be added together, then divided by the number of data points.
all the data points are multiplied together, then divided by the number of data points.
all of the data points must be added together, then divided by the number of data points.
the most frequently occurring data point is selected. - correct answersall of the data points must be
added together, then divided by the number of data points.
The ___________ mean is the multiplicative average of a data set. - correct answersgeometric
The measure of center where half the values of the data set lie above this measure and half the values
of the data set lie below this measure is known as the
mean.
outlier.
median.
mode. - correct answersmedian
