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

9 and 3.35 respectively

Step-by-step 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