2.3 part 1 Other Types of Graphs – Bar Graphs, Pareto Charts, Time Series Graphs
Bar Graphs
When data are ______________________________________ or __________________________________________,
bar graphs can be used to represent the data. It displays the data using _________________________________ or
_____________________________ bars whose heights or lengths represent the ____________________________ of
the data.
1.
Draw and label the x and y-axes. For the horizontal bar graph place the frequency scale on the x-axis, and for
the vertical bar graph place the frequency scale on the y-axis.
2. Draw the bars corresponding to the frequencies.
Example
The table shows the average money spent by first-year college students. Draw a horizontal and vertical bar graph for
the data.
Pareto Charts
This is used to represent a frequency distribution for a ____________________________________ variable, and
the _________________________________________ are displayed by the heights of ________________________bars,
which are arranged in order from highest to lowest.
Step 1: Arrange the data from the largest to smallest according to frequency.
Step 2: Draw and label the x and y axes.
Step 3: Draw the bars corresponding to the frequencies.
Analyze the heights of the bars.
Example:
The data shown here consist of the number of homeless people for a sample of selected cities. Construct and analyze a
Pareto chart for the data.
City
Number
Atlanta
6832
Baltimore
2904
Chicago
6680
St. Louis
1485
Washington
5518
The Time Series Graph
For data that is collected over _______________________________________________________.
Step 1: Draw and label the x and y axes.
Step 2: Label the x axis for years and the y axis for the number.
Step 3: Plot each point according to the table
Step 4: Draw line segments connecting adjacent points. Do not try to fit a smooth curve through the data points.
Analyze the slopes, the trend or pattern, etc.
Example:
The number of homicides that occurred in the workplace for the years 2003 to 2008 is shown. Draw and analyze a time
series graph for the data.
Year
’03
’04
’05
’06
’07
‘08
Number
632
559
567
540
628
517
Two or more data sets can be compared on the same graph called a
________________________________________________________________________.
Name: __________________________________
Homework 2.3 part 1
Bar Graph, Pareto Chart, and Time Series
1.
The World Roller Coaster Census Report lists the following number of roller coasters on each continent.
Represent the data graphically, using a Pareto chart and a horizontal bar graph.
2.
The average weekly instruction time in schools for 5 selected countries is shown. Construct a vertical bar graph
and a Pareto chart for the data.
Thailand
30.5 hours
China
26.9 hours
France
24.8 hours
United States
22.2 hours
Brazil
19 hours
Source: Organization for Economic cooperation and Development.
3.
The safety record of US airlines for 10 years is shown. Construct a time series graph for the data.
Year
Major Accidents
1997
2
1998
0
1999
2
2000
3
2001
1
2002
1
2003
2
2004
4
2005
2
2006
2
2007
0
Source: National Transportation Safety Board