sigma
Pronunciation: [ˈsɪɡmə]
Context: "mathematics"
(noun) the Greek letter 'Σ' used to represent the sum of a series of numbers. In math, it's like a symbol that tells you to add things together.
Example
In our math class, we used sigma to find the total of all the numbers in our homework.
Example
We couldn't use sigma if we were only multiplying the numbers, not adding them.
Example
What does the sigma symbol mean in this equation?
Context: "statistics"
(noun) a symbol that represents standard deviation, which tells us how spread out the numbers are in a data set. It helps us understand if the numbers are close to the average or not.
Example
The sigma value showed that most of the scores were pretty close to the class average.
Example
If the sigma is too high, that means the scores are not close to each other at all.
Example
Why is sigma important when analyzing the data?
Context: "science"
(noun) a term that can describe a particular value or concept in different scientific contexts, often used to represent certain standards or measurements.
Example
In chemistry class, we learned about sigma bonds, which are important in forming molecules.
Example
A bad experiment didn’t show any clear sigma measurements, making it hard to draw conclusions.
Example
What is the role of sigma in the experiment we conducted?