Module 4: Descriptive Statistics for a
Single Variable- VOCABULARY
qualitative data - ANS Non-numeric information based on some quality or characteristic.
mode - ANS The most frequent value in a dataset.
pie chart - ANS A graphical display that shows data in categories as percentages of a circle.
quantitative data - ANS Data values that are numbers, representing quantities that can be
counted or measured.
interquartile range - ANS The difference, in value, between the bottom and top 25 percent of
the sample or population.
five-number summary - ANS The minimum, first quartile, median, third quartile, and maximum.
A box plot represents the five numbers in a five-number summary.
stem plot - ANS A visual representation of data in which individual data points are plotted to the
right of a horizontal line, or chart, and the left shows the interval categories.
distribution - ANS An arrangement of values that illustrates their frequency or occurrence.
statistics - ANS The science that deals with the interpretation of numerical facts or data through
theories of probability. Also, the numerical facts or data themselves.
measure of central tendency - ANS A summary measure that is used to describe an entire set
of data with one value that represents the middle or center of the data set's distribution. There
are three main measures: mean, median, or mode.
outlier - ANS An observation point that is significantly distant from the other observations in the
dataset.
bar chart - ANS A graph that displays data that is distributed over groups or categories.
unimodal - ANS A set of data having one mode.
center - ANS One of three measures that describe what is "normal" in a data set: mean,
median, or mode.
Single Variable- VOCABULARY
qualitative data - ANS Non-numeric information based on some quality or characteristic.
mode - ANS The most frequent value in a dataset.
pie chart - ANS A graphical display that shows data in categories as percentages of a circle.
quantitative data - ANS Data values that are numbers, representing quantities that can be
counted or measured.
interquartile range - ANS The difference, in value, between the bottom and top 25 percent of
the sample or population.
five-number summary - ANS The minimum, first quartile, median, third quartile, and maximum.
A box plot represents the five numbers in a five-number summary.
stem plot - ANS A visual representation of data in which individual data points are plotted to the
right of a horizontal line, or chart, and the left shows the interval categories.
distribution - ANS An arrangement of values that illustrates their frequency or occurrence.
statistics - ANS The science that deals with the interpretation of numerical facts or data through
theories of probability. Also, the numerical facts or data themselves.
measure of central tendency - ANS A summary measure that is used to describe an entire set
of data with one value that represents the middle or center of the data set's distribution. There
are three main measures: mean, median, or mode.
outlier - ANS An observation point that is significantly distant from the other observations in the
dataset.
bar chart - ANS A graph that displays data that is distributed over groups or categories.
unimodal - ANS A set of data having one mode.
center - ANS One of three measures that describe what is "normal" in a data set: mean,
median, or mode.
