Data is more informative and useful when presented visually, in charts, tables and diagrams. Sometimes, a number such as the mean, median, or mode, can help you better understand the meaning of a data set. Often, surveys are used to collect data. Some examples of when surveys are used include political elections and advertising.

Links to interactivities to help your mastery of the topics are to the right.

Some terms you should know are:

range

mode

mean

median

outlier

upper quartile

lower quartile

quartile

trend

bar graph

line graph

double line graph

population

sample

random sample

survey

frequency table

histogram

scatterplot

frequency
stem-and-leaf diagram line plot box-and-whisker plot trend line

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