Frequency Distribution

Updated 18 Sep 2026

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What it is
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  a table showing classes (intervals) of data along with the count — the frequency $f$ — of data points falling in each class
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Guidelines for constructing one
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  decide the number of classes (typically 5–20)
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  determine the class width
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  determine the class limits
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  tally each data point into its class
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  count the tallies to get each class's frequency
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Sturges' rule (for estimating number of classes)
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  $k = 1 + 3.3 \log n$ , where $n$ is the number of data points
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Related

Linked references 11