2. Calculate the unbiased standard deviation for each variable in the following data set. What is the standard deviation for weight. What is the standard deviation for height? Show all steps/work by hand.

1.	Height	Weight
2.	53	156
3.	46	131
4.	54	123
5.	44	142
6.	56	156
7.	76	171
8.	87	143
9.	65	135
10.	45	138
11.	44	114
12.	57	154
13.	68	166
14.	65	153
15.	66	140
16.	54	143
17.	66	156
18.	51	173
19.	58	143
20.	49	161
21.	48	131