Calculating variance:
The Variance formula is:
From this formula they can find the population variance they sum up the squared individual scores && subtract from them the sum of the scores quantity squared divided by the number of scores Then variance the of this quantity divided by the number of scores. They can see that the only information they must make this calculation in the process of the sum of the scores, the sum of the squared scores, & the number of scores. The worksheet below shows these quantities.
To know more:
9th maths
Diagonal line
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