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	Team	Rating	Sigma	Upper_Bound	Lower_Bound
1	NewEngland	3004.589668	355.932129	3716.453926	2292.725410
2	Carolina	2967.725049	344.046048	3655.817145	2279.632953
3	Cincinnati	2953.697232	363.479605	3680.656442	2226.738023
4	Denver	2672.181487	305.341121	3282.863729	2061.499245
5	GreenBay	2574.923362	325.413126	3225.749614	1924.097111
6	Minnesota	2437.860932	305.879979	3049.620889	1826.100974
7	Indianapolis	2224.590194	271.021302	2766.632798	1682.547589
8	Arizona	2173.347916	299.015166	2771.378249	1575.317583
9	StLouis	2129.899204	286.418156	2702.735517	1557.062891
10	Pittsburgh	2107.547418	257.136655	2621.820727	1593.274108
11	NewYorkG	2079.303110	261.768775	2602.840661	1555.765560
12	Seattle	2035.626531	319.156772	2673.940074	1397.312987
13	Philadelphia	2020.290703	281.997790	2584.286283	1456.295124
14	Oakland	2012.901253	274.197702	2561.296657	1464.505849
15	NewYorkJ	1993.545874	297.058003	2587.661880	1399.429867
16	NewOrleans	1973.691989	248.614637	2470.921264	1476.462715
17	Buffalo	1907.237046	282.707585	2472.652215	1341.821876
18	KansasCity	1899.422754	293.013236	2485.449226	1313.396282
19	Atlanta	1893.594199	271.012648	2435.619496	1351.568902
20	Washington	1876.735703	298.853860	2474.443424	1279.027982
21	Cleveland	1795.957806	280.402272	2356.762351	1235.153261
22	TampaBay	1789.714432	275.399388	2340.513207	1238.915656
23	SanFrancisco	1782.001150	275.854713	2333.710575	1230.291725
24	Houston	1730.225922	296.130047	2322.486016	1137.965829
25	Chicago	1719.810013	279.290436	2278.390885	1161.229141
26	Miami	1701.047014	287.772455	2276.591924	1125.502104
27	Baltimore	1607.992855	284.926793	2177.846440	1038.139270
28	Jacksonville	1586.022890	276.090414	2138.203718	1033.842062
29	Tennessee	1555.358683	280.365399	2116.089482	994.627884
30	SanDiego	1471.374541	262.226953	1995.828448	946.920634
31	Dallas	1452.476562	305.374319	2063.225201	841.727924
32	Detroit	1388.859519	313.389677	2015.638872	762.080165

Sigma is an expression of confidence in a team's rating. You can treat it as a measure of uncertainty in the rating value, so a lower value means we're more certain about a rating than a higher value.
Upper and lower bounds are a 95% confidence interval for the team's rating, meaning that their true skill rating lies somewhere between those two values (that's not an entirely accurate explanation of a confidence interval, but for our purposes it'll do).