Question

Calculate the mean and standard deviation 3,5,6,9,11,12,17​

Answer 1

9 and 3.35 respectively

Explanation:

Mean=Sum of data÷No. of data

=(3+5+6+9+11+12+17)÷7

=63÷7

=9

Standard Deviation=√{(sum of squares of data÷no. of data)-(sum of data÷no. of data)

=√(705÷7)-(63÷7)

=√100.71÷9

=√11.19

=3.35