Answer
Variance:$5204.82 \ hic^2.$
Standard deviation:$72.14 \ hic$
Range:$218 \ hic$.
Work Step by Step
By using the results from before: $\mu=430.14 \ hic.$
Variance=$\frac{\sum (x-\mu)^2}{n}=\frac{(371-430.14)^2+(351-430.14)^2+...+(501-430.14)^2}{7}=5204.82 \ hic^2.$
Standard deviation=$\sqrt{variance}=\sqrt{5204.82 \ hic^2}=72.14 \ hic$
Range=maximum value-minimum value=$544 \ hic-326 \ hic=218 \ hic$.
