CK-12 Probability and Statistics - Advanced

(Marvins-Underground-K-12) #1

2.2. Common Graphs and Data Plots http://www.ck12.org


Line Plots


Your graphing calculator will also draw a line plot and the process is almost identical to that for creating a scatterplot.
Enter the data from the US Municipal waste example into your lists. The only change that you need to make is to
choose a line plot in the Plot1 menu.


Set an appropriate window, and graph the resulting plot.


Lesson Summary


Bar graphsare used to represent categorical data in a manner that looks similar to, but is not the same as a histogram.
Pie (or circle) graphsare also useful ways to display categorical variables, especially when it is important to show
how percentages of an entire data set fit into individual categories. A dot plotis a convenient way to represent
univariatenumerical data by plotting individual dots along a single number line to represent each value. They are
especially useful in giving a quick impression of the shape, center, and spread of the data set, but are tedious to
create by hand when dealing with large data sets. Stem and leaf plotsshow similar information with the added
benefit of showing the actual data values.Bivariatedata can be represented using ascatterplotto show what, if
any,associationthere is between the two variables. Usually one of the variables, theexplanatory (independent)

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