Meaning of the word "standard deviation" in English

What does "standard deviation" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

standard deviation

US /ˈstæn.dɚd ˌdiː.viˈeɪ.ʃən/
UK /ˈstæn.dəd ˌdiː.viˈeɪ.ʃən/
"standard deviation" picture

Noun

a quantity calculated to indicate the extent of deviation for a group as a whole; a measure of how spread out numbers are

Example:
The standard deviation of the test scores was quite low, meaning most students performed similarly.
In statistics, standard deviation is used to measure the amount of variation in a set of values.