Mathematics in senior three. For example, the fifth question, if the average calculation method is different, can we judge the stability according to the average? Still seeking the standard deviation? The standard deviation of this question Stability can only be judged by standard deviation,

The average value cannot measure stability.

Difference calculation method,

For example, group A, choose a good reference number, such as 900,

Subtract 900 from each number to get new data.

-96,84,89,-83, 19,-60, 12, 10 1

The variance is

(96? +84? +89? +83? + 19? +60? + 12? + 10 1? )÷8-8.25?

This calculation should be easier.