Question

what is sigma
and value of it

Answer 1

$hello \: frnd$
Sigma is a measurement of variability, which is defined by the Investor Words website as "the range of possible outcomes of a given situation."


To calculate the standard deviation of those numbers:

Work out the Mean (the simple average of the numbers)

Then for each number: subtract the Mean and square the result.

Then work out the mean of those squared differences.

Take the square root of that and we are done!

Answer 2

Sigma means sum of all things in a given table.

Eg if x = 3,5,7,8,1

Then Sigma x = 3+5+7+8+1