Cumulative frequency
Cumulative Frequency
Cumulative frequency (pronounced: kyu-myu-luh-tiv free-kwuh n-see) is a statistical term used in the field of Epidemiology and Biostatistics. It refers to the sum of the frequencies of all values up to a certain point in a data set.
Etymology
The term 'cumulative frequency' is derived from the Latin word 'cumulatus' meaning 'heap' or 'pile', and the English word 'frequency' which originates from the Latin word 'frequentia', meaning 'crowd' or 'multitude'.
Related Terms
- Frequency Distribution: A summary of how often different scores occur within a sample of scores.
- Relative Frequency: The ratio of the absolute frequency to the total sample size.
- Cumulative Frequency Distribution: A form of a frequency distribution that represents the sum of a class and all classes below it.
- Histogram: A graphical representation of the distribution of a dataset.
Usage in Medical Field
In the medical field, cumulative frequency is often used in epidemiological studies to understand the distribution of health-related events. For example, it can be used to track the number of new cases of a disease over a certain period. It can also be used in Clinical Trials to understand the distribution of patient responses to a particular treatment.
See Also
External links
- Medical encyclopedia article on Cumulative frequency
- Wikipedia's article - Cumulative frequency
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