Answer
Variance:$7879.81 \ hic^2.$ Standard deviation:$88.77 \ hic$ Range:$218 \ hic$.
Work Step by Step
The mean can be counted by summing all the data and dividing it by the number of data: $\frac{371+356+393+544+326+520+501}{7}=430.14$: $\mu=430.14 \ hic.$ Variance=$\frac{\sum (x-\mu)^2}{n}=\frac{(371-430.14)^2+(351-430.14)^2+...+(501-430.14)^2}{7}=7879.81 \ hic^2.$ Standard deviation=$\sqrt{variance}=\sqrt{7879.81 \ hic^2}= 88.77 \ hic$ Range=maximum value-minimum value=$544 \ hic-326 \ hic=218 \ hic$.
