Respuesta :

Answer:

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