Sample	xbar	s
1	848	20.1
2	832	1.1
3	826	11
4	833	7.5
5	837	12.5
6	834	1.8
7	834	1.3
8	838	7.4
9	835	2.1
10	852	18.9
11	836	3.8
12	823	12.6
13	835	4.4
14	843	3.6
15	841	5.9
16	840	3.6
17	833	4.9
18	840	8
19	826	6.1
20	839	10.2
21	836	14.8
22	829	6.7