Editing Biostatistics (section)

==== Frequency tables ====

One type of table is the [[frequency]] table, which consists of data arranged in rows and columns, where the frequency is the number of occurrences or repetitions of data. Frequency can be:<ref>{{Cite web|url=https://www.sangakoo.com/en/unit/absolute-relative-cumulative-frequency-and-statistical-tables|title=Absolute, relative, cumulative frequency and statistical tables – Probability and Statistics|last=Maths|first=Sangaku|website=www.sangakoo.com|language=en|access-date=2018-04-10}}</ref>

'''Absolute''': represents the number of times that a determined value appear;

<math display="block">N = f_1 + f_2 + f_3 + ... + f_n</math>

'''Relative''': obtained by the division of the absolute frequency by the total number;

<math display="block">n_i = \frac{f_i}{N}</math>

In the next example, we have the number of genes in ten [[operon]]s of the same organism.

: {{math|1=Genes = {{mset|2,3,3,4,5,3,3,3,3,4}}}}
{| class="wikitable"
|+
!Genes number
!Absolute frequency
!Relative frequency
|-
|1
|0
|0
|-
|2
|1
|0.1
|-
|3
|6
|0.6
|-
|4
|2
|0.2
|-
|5
|1
|0.1
|}