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Q&A #810


ogive or cumulative chart

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From: Marielouise (for Teacher2Teacher Service)
Date: Nov 22, 1998 at 13:39:09
Subject: Re: ogive or cumulative chart

I asked a few friends and here are the responses that I received.

- An ogive is a line graph of cumulative frequency or cumulative relative
frequency.  Perhaps that is a start for where to proceed.

The charts would be to take the frequencies for each interval and add the
frequencies interval by interval. When all are added the last interval should
have a sum of 100%.  Look in a high school text such as Dick Brown's
"Advanced Mathematics" under statistics or an elementary college statistics
text.

- An ogive curve is nothing more than the plot of the cumulative probability
distribution function. It takes its name from an architectural feature found
called a Gothic arch; actually only the left half of the arch.

- An ogive is a histogram of accumulated relative frequencies. It is a
graphical representation of the sample cumulative distribution function. The
book Introductory Statistics, Mann (p.68) has a discussion.

- "Exploring Statistics with the TI-82 Graphics Calculator" by Dr. Brendan
Kelly has a lesson on using ogives.  It is a good reference for teaching
statistics with graphing calculators.

 -Marielouise, for the Teacher2Teacher service

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