Question 207452
a)	Mean- 2
b)	Median- 2
c)	Sum of squared deviaton-52
d)	Variance-2.47
e)	Standard Deviation- 1.57

To get the sum of squared deviation subtract the mean from each score which will give you each score's deviation score then square each of these scores.  Add up the squared deviation scores and you have the sum of squared deviation scores.  Divide the sum of the squared deviation scores by the number of scores and you will have the variance.  The square root of the variance is the standard deviation.
S  M  DS   SDS
0-2= -2 *-2=4
0-2= -2 *-2=4
0-2= -2 *-2=4
0-2= -2 *-2=4
0-2= -2 *-2=4
1-2=-1  *-1=1
1-2=-1  *-1=1
1-2=-1  *-1=1
1-2=-1  *-1=1
1-2=-1  *-1=1
2-2=0   *0=0
2-2=0   *0=0
2-2=0   *0=0
3-2=1  *1=1
3-2=1  *1=1
4-2=2  *2=4
4-2=2  *2=4
4-2=2  *2=4
4-2=2  *2=4
5-2=3  *3=9
Sum SD = 52   
Variance 52/21=2.47
Standard Deviation- square root of 2.47= 1.57