Frequency (statistics)

（重定向自Relative frequency density）

Histogram of travel time (to work), US 2000 census. Histograms depict the frequencies of observations occurring in certain ranges of values

Example of a bar chart, with 'Country' as the discrete data set.

In statistics the frequency (or absolute frequency) of an event $i$ is the number $n_i$ of times the event occurred in an experiment or study. These frequencies are often graphically represented in histograms.

单词	Relative frequency density
释义	Relative frequency density 英语百科 Frequency (statistics) （重定向自Relative frequency density） In statistics the frequency (or absolute frequency) of an event $i$ is the number $n_i$ of times the event occurred in an experiment or study. These frequencies are often graphically represented in histograms.
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