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Part 11:
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Ogives or Cumulative Frequency Curves |
Description
| The ogive is a fairly specialist curve, used very extensively in
statistics, to analyse data for a large sample or population. The
word ogive comes from architecture and describes the kind of S-shaped
curve you often get in cornices. The ogive represents cumulative frequency, which is simply a running total.The graph shows you how many items there are below a certain value. You will notice that the vertical axis (which is the cumulative frequency axis) always starts at 0. The horizontal axis starts at whatever is the number below which there are zero items. |
