Sample	Hard1	Hard2	Hard3	Hard4	Mean	StDev
1	12.087	12.492	12.145	12.077	12.2	0.1968
2	12.225	12.404	12.359	12.786	12.444	0.2407
3	12.183	12.449	12.117	12.279	12.257	0.1442
4	12.304	12.255	12.449	12.312	12.33	0.0832
5	12.48	12.221	12.314	12.262	12.319	0.1137
6	12.128	12.472	12.424	12.204	12.307	0.1669
7	12.136	12.196	12.169	12.391	12.223	0.1147
8	12.533	11.903	12.384	12.595	12.354	0.3133
9	12.351	11.983	13.048	12.187	12.392	0.4624
10	12.591	13.06	12.605	11.813	12.517	0.5176
11	11.638	12.412	11.745	12.3	12.024	0.3889
12	12.747	12.22	12.418	12.312	12.424	0.2299
13	12.878	12.335	12.931	12.24	12.596	0.359
14	12.096	12.534	12.62	11.971	12.305	0.3198
15	12.049	12.909	12.37	12.869	12.549	0.4139
16	12.554	12.898	13.32	12.756	12.882	0.3243
17	12.868	12.308	12.237	11.894	12.327	0.4036
18	11.802	12.725	13.085	12.896	12.627	0.5693
19	12.636	12.414	12.882	12.331	12.566	0.247
20	13.008	12.66	12.217	12.271	12.539	0.3697