What does mean standard deviation Meaning and Definition
What does mean standard deviation
Pronunciation
/ˈdʒərbərə/
Part of Speech
Noun, Phrase
Definition
A measure of the amount of variation or dispersion of a set of values from their mean value, often abbreviated as σ (sigma), used in statistics to describe the spread of a distribution.
Etymology
The term “standard deviation” originated in the late 19th century, derived from the concept of standard units in statistical analysis.
Usage Notes
Standard deviation is often used in scientific and technical fields, such as statistics, finance, and biology, to describe the spread of data.
Cultural References
Standard deviation has appeared in popular culture, such as in the TV show “The Big Bang Theory,” where characters discuss its application in statistics.
Idiomatic Expressions or Phrases
“Standard deviation” is often used in phrases like “normal distribution” or “bell curve,” referring to the symmetrical distribution of data around the mean.
Related Words or Phrases
- Variance
- Mean
- Median
Collocations
- Standard deviation of the mean
- Standard deviation of the sample
Frequency of Use
Standard deviation is widely used in various fields, with an average frequency of 10-20 times per million words spoken or written.
Common Misspellings
- Standart deviation
- Stendard deviation