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Pie: contribution of each category to the total (e.g. proportion of a population of mice that are white, gray, or black).
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Types of graphs
MST 101
Dr. Maureen Markel September, 2006
Column or bar : for discontinuous, unordered or qualitative (male, female) data.
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TV dancing sports studying
Favorite Activity of MST Students
Pie: contribution of each category to the total (e.g. proportion of a population of mice that are white, gray, or black).
Favorite Activities of MST students
TV29%
dancing16%
sports21%
studying34%
Clustered Bar: for situations when you wish to express the part of the whole that data play (e.g. percent of the diet that four foods occupy for three species of fish).
Favorite Activities of MST students
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TV dancing sports studying
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Males
Females
XY Scatter Plot: For continuous data. The data are pairs of X and Y values (although there can be additional Y’s) representing an independent and one or more dependent variables.
Relationship of Calories to Fat in McDonalds' Burgers
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Calories
Fat (
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The data will appear as points that can be connected by lines.
In this kind of graph, the points can be connected by lines or a trend line can be added to indicate the fit of a line to the data.
Line Graph: Similar in use to X-Y for continuous quantitative independent variables. Intervals on X-axis must be uniform and data must be ordered.
Price of Eggs over the Decade
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1989 1990 1991 1992 1993 1994 1995 1996
Year
Pric
e ($
)
Line graphs usually show trends over time.
Creating a Pie Graph from a bar/column graph
1. Compute Total2. Find percentage of each part3. Multiply each percentage by total degrees in circle4. Create circle and draw radius5. Measure angle using the last line drawn
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TV dancing sports studying
Favorite Activity of MST Students
Questions