what is the standard deviation for the numbers 1,6,6,3,7,4,and10

Question

I need to know how to find the standard deviation for the numbers 1,6,6,3,7,4,and10.

Show me the steps

Answer 1

x	x*x
1	1
6	36
6	36
3	9
7	49
4	16
10	100

Mean of x=(1+6+6+3+7+4+10)/7               

                 =37/7

                  =5.286

Mean of x*x=(1+36+36+9+49+16+100)/7

                     =247/7

                     =35..286

variance=Mean of x*x - Mean of x*Mean of x

               =35.286 - 5.286*5.286

                =7.344

Standard deviation= square root of variance

                                  =2.71