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sigma
B1
noun
Sử dụng:
80%
Greek letter
Tương ứng: Greek letter
Phát âm: /ˈsɪɡmə/
Ý nghĩa: The eighteenth letter of the Greek alphabet, used in writing and mathematics.

Sigma is a letter from the Greek alphabet. People use it in math and science. It looks like the letter 'S' or a curly 'E'.

Sigma is the 18th Greek letter.

Sigma looks like a curly E in math.

2
B2
noun
Sử dụng:
85%
summation symbol
Tương ứng: summation symbol
Phát âm: /ˈsɪɡmə/
Ý nghĩa: The symbol used in mathematics to represent the sum of a sequence of numbers.

In math, sigma means to add many numbers together. We write sigma, then numbers, to find the total amount. It helps in adding fast.

Use sigma to add many numbers fast.

The sigma sign means sum in math.

Từ Tương Tự:
3
C1
noun
Sử dụng:
70%
standard deviation
Tương ứng: standard deviation
Phát âm: /ˈsɪɡmə/
Ý nghĩa: In statistics, sigma represents the standard deviation, a measure of how spread out numbers are.

Sigma is a small number that shows if data points are close or far from the average number. A big sigma means data points are very different.

Sigma shows how data spreads out a lot.

The sigma tells us the data's spread.

4
B2
noun
Sử dụng:
60%
quality measure
Tương ứng: quality measure
Phát âm: /ˈsɪɡmə/
Ý nghĩa: In business and quality management, sigma refers to Six Sigma, a method to improve processes and reduce errors.

Sigma in business means a system to lower errors and improve work. Six Sigma is a popular method that helps companies fix problems.

Six Sigma helps make work better.

The company uses sigma to reduce mistakes.

5
C1
noun
Sử dụng:
50%
conductivity or stress
Tương ứng: conductivity or stress
Phát âm: /ˈsɪɡmə/
Ý nghĩa: In physics and engineering, sigma denotes conductivity or stress in materials.

In science, sigma is a symbol for things like how well electricity passes through a material or how much force a material can take. It is used in physics and engineering.

Sigma shows how strong the metal is.

Sigma describes electric flow in wires.

6
C2
noun
Sử dụng:
40%
syllable
Tương ứng: syllable
Phát âm: /ˈsɪɡmə/
Ý nghĩa: In linguistics, sigma is used to represent a syllable in phonology.

Linguists use sigma as a sign for a syllable, a single unit of sound in a word. This helps study how words are formed and spoken.

The word has three sigmas.

Sigma means a sound unit in words.

7
B2
noun
Sử dụng:
45%
independent man
Tương ứng: independent man
Phát âm: /ˈsɪɡmə/
Ý nghĩa: In social contexts, sigma male describes a personality type that is independent and does not follow social hierarchies.

Sigma male is a popular term for a man who acts alone and does not care about being leader or follower. They are seen as independent and quiet.

He is a sigma male, very independent.

Sigma males do not follow group rules.

sigma
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