18. Five mark example problem II

The amount of rainfall in a particular season for \(6\) days are given as \(17.8 \ cm\), \(19.2 \ cm\), \(16.3 \ cm\), \(12.5 \ cm\), \(12.8 \ cm\) and \(11.4 \ cm\). Find its standard deviation.

 

Answer:

 

Standard deviation \(=\)