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	Team	Rating	Sigma	Upper_Bound	Lower_Bound
1	NewEngland	2958.218954	378.275724	3714.770402	2201.667507
2	Denver	2917.923043	387.664369	3693.251782	2142.594305
3	Cincinnati	2888.591325	393.624934	3675.841193	2101.341457
4	GreenBay	2852.995960	389.686042	3632.368045	2073.623875
5	Carolina	2773.821093	400.713666	3575.248425	1972.393761
6	Atlanta	2350.173637	333.135227	3016.444091	1683.903184
7	Minnesota	2252.553215	353.938121	2960.429457	1544.676973
8	StLouis	2176.385546	325.305101	2826.995748	1525.775345
9	NewYorkG	2110.528064	302.117954	2714.763971	1506.292157
10	NewOrleans	2092.689292	291.574848	2675.838987	1509.539596
11	Arizona	2070.059038	322.997787	2716.054612	1424.063465
12	NewYorkJ	2054.489859	352.535494	2759.560847	1349.418872
13	Oakland	2023.154475	324.357533	2671.869540	1374.439410
14	Pittsburgh	2010.262537	283.711059	2577.684656	1442.840418
15	Indianapolis	1967.605116	308.922367	2585.449849	1349.760382
16	Philadelphia	1962.751249	296.887979	2556.527207	1368.975291
17	Seattle	1946.415150	342.400271	2631.215693	1261.614608
18	Cleveland	1900.563909	305.228304	2511.020517	1290.107301
19	Washington	1892.450878	305.042979	2502.536836	1282.364920
20	Miami	1846.767255	319.736627	2486.240509	1207.294002
21	KansasCity	1827.022993	311.045060	2449.113113	1204.932873
22	Buffalo	1783.863212	306.185713	2396.234638	1171.491786
23	SanDiego	1727.677966	306.399990	2340.477946	1114.877985
24	Jacksonville	1664.052119	293.447091	2250.946300	1077.157938
25	Chicago	1659.461167	316.548986	2292.559138	1026.363195
26	Houston	1651.952359	315.258335	2282.469030	1021.435689
27	SanFrancisco	1640.711941	320.814838	2282.341616	999.082266
28	TampaBay	1623.698788	331.256221	2286.211229	961.186346
29	Dallas	1614.602805	349.897672	2314.398149	914.807462
30	Detroit	1473.502167	336.328591	2146.159348	800.844985
31	Baltimore	1439.738029	312.886123	2065.510274	813.965783
32	Tennessee	1333.844790	340.917347	2015.679483	652.010097

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).