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Part 11:
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Ogives |
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An ogive is a specialised line graph which shows how many items there are which are below a certain value. The horizontal axis shows the upper class boundaries marked on the scale, just like a histogram. The vertical axis shows the cumulative frequency, which is just a fancy name for a running total. Some line graphs are actually ogives! Example 11a Here are the monthly amounts of money donated to a church roof appeal fund during a 6-month period.
The church would like to display the total amount donated to date, month by month, thus showing what the grand total is by the end of any period of time. The table showing this data looks like this:
Draw an ogive to illustrate this. |
