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Davem10852 | 17:03 Sun 28th Nov 2004 | Quizzes & Puzzles
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what is a mid interval


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mid interval is exactly what it says - the middle of an interval. ie if you are working with grouped ages - say 30 years old to 40 years old the mid interval will be 35 years.  You use it to help to estimate the mean and plot frequency polygons.

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