Given 15 data items:

Question

11, 15, 13, 16, 8, 8, 9, 10, 11, 4, 9, 6, 8, 3, 17

Calculate the:

range
variance
standard deviation
first quartile
second quartile (median)
third quartile

My answers are:

1. Range :14
2. Variance: 15.7
3. 3.96
4. 8
5. 9
6. 13

I just want someone to check my answers Im not sure I am rounding them correctly.

Thanks!