- Module 4: Descriptive Statistics for a
Single Variable with Complete Solutions
bimodal - ANSWER-A description of a data set with two modes.
measures of spread - ANSWER-A number of measures used to determine the distance
of data from the center of the data set, such as range and standard deviation.
pie chart - ANSWER-A graphical display that shows data in categories as percentages
of a circle.
unimodal - ANSWER-A set of data having one mode.
check sheet - ANSWER-A structured form or table that allows data to be collected by
marking how often an event has occurred in a certain interval.
center - ANSWER-One of three measures that describe what is "normal" in a data set:
mean, median, or mode.
valid data - ANSWER-Data that results from a test that accurately measures what it was
intended to measure.
quantitative data - ANSWER-Data values that are numbers, representing quantities that
can be counted or measured.
normal distribution - ANSWER-A common type of distribution of data points that forms a
bell shaped, symmetrical curve around the mean.
statistics - ANSWER-The science that deals with the interpretation of numerical facts or
data through theories of probability. Also, the numerical facts or data themselves.
qualitative data - ANSWER-Non-numeric information based on some quality or
characteristic.
five-number summary - ANSWER-The minimum, first quartile, median, third quartile,
and maximum. A box plot represents the five numbers in a five-number summary.