sample	obs1	obs2	obs3	obs4	mean	stdev
1	11.432	11.35	11.582	11.184	11.387	0.166
2	11.791	11.323	11.734	11.512	11.59	0.2149
3	11.373	11.807	11.651	11.651	11.62	0.1806
4	11.787	11.585	11.386	11.245	11.501	0.2364
5	11.633	11.212	11.568	11.469	11.47	0.1851
6	11.648	11.653	11.618	11.314	11.558	0.1636
7	11.456	11.27	11.817	11.402	11.486	0.2339
8	11.394	11.754	11.867	11.003	11.504	0.3905
9	11.349	11.764	11.402	12.085	11.65	0.3437
10	11.478	11.761	11.907	12.091	11.809	0.2588
11	11.657	12.524	11.468	10.946	11.649	0.6564
12	11.82	11.872	11.829	11.344	11.716	0.2492
13	12.187	11.647	11.751	12.026	11.903	0.2479
14	11.478	11.222	11.609	11.271	11.395	0.1807
15	11.75	11.52	11.389	11.803	11.616	0.1947
16	12.137	12.056	11.255	11.497	11.736	0.4288
17	12.055	11.73	11.856	11.357	11.75	0.2939
18	12.107	11.624	11.727	12.207	11.916	0.2841
19	11.933	10.658	11.708	11.278	11.394	0.561
20	12.512	12.315	11.671	11.296	11.948	0.5641