SIGMA - Định nghĩa trong Từ điển tiếng Anh
sigma (noun)
/ˈsɪɡmə/
Giải nghĩa:
The 18th letter of the Greek alphabet
Ví dụ:
The Greek word for seven starts with the letter sigma.
sigma (noun)
/ˈsɪɡmə/
Giải nghĩa:
Symbol in mathematics representing the sum of a series of numbers
Ví dụ:
In my math class, we learned that sigma notation is used to write out the sum of a series.
Cách sử dụng
Sigma is a letter in the Greek alphabet and it is often used in science and mathematics as a symbol to represent standard deviation or variance. Standard deviation is a measure of how spread out a group of numbers is from their average. It is usually used to measure things like the variability in test scores or the distribution of data in research studies. In science, sigma is also used to denote the statistical significance of a result. It can also be used in the context of the normal distribution or bell curve, where sigma values represent the percentage of data falling within certain ranges. In everyday conversation, sigma may be used metaphorically to describe something that deviates from the norm or is unusual or exceptional.
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