1. Find the range of the data above.
A. 3
B. 4
C. 5
D. 6
2.Find the mean deviation of the data above.
A. 1
B. 1.1
C. 1.2
D. 1.3
3.Find the variance of the data above.
A. 2.5
B. 2.6
C. 2.7
D. 2.8
4. Find the standard deviation of the data above.
A. 1.66
B. 1.67
C. 1.68
D. 1.69​