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	Team	Rating	Sigma	Upper_Bound	Lower_Bound
1	NewEngland	3057.319836	332.192389	3721.704613	2392.935058
2	Carolina	2999.651617	329.060448	3657.772513	2341.530722
3	Denver	2461.995258	262.967404	2987.930067	1936.060449
4	GreenBay	2363.849309	264.795777	2893.440862	1834.257756
5	Minnesota	2352.504463	265.139336	2882.783135	1822.225791
6	Arizona	2335.866166	273.972613	2883.811391	1787.920941
7	Cincinnati	2332.073985	283.666431	2899.406848	1764.741123
8	Indianapolis	2283.660196	257.182328	2798.024851	1769.295541
9	Pittsburgh	2162.564665	245.091009	2652.746684	1672.382647
10	KansasCity	2160.795470	256.959717	2674.714904	1646.876035
11	Houston	2101.865225	253.609339	2609.083903	1594.646546
12	NewYorkG	2062.774527	256.493269	2575.761066	1549.787988
13	Buffalo	2008.103968	258.249118	2524.602203	1491.605733
14	Washington	1992.704023	268.251219	2529.206460	1456.201585
15	Seattle	1987.203324	270.804066	2528.811455	1445.595192
16	TampaBay	1943.713507	245.060235	2433.833977	1453.593037
17	StLouis	1906.526958	229.180977	2364.888912	1448.165004
18	NewOrleans	1882.181611	234.486894	2351.155399	1413.207823
19	Detroit	1860.039536	258.032387	2376.104309	1343.974762
20	Chicago	1843.553507	247.412376	2338.378260	1348.728755
21	Oakland	1841.566539	243.832308	2329.231155	1353.901924
22	Atlanta	1834.527966	257.175033	2348.878033	1320.177900
23	NewYorkJ	1788.433425	257.373289	2303.180002	1273.686848
24	Philadelphia	1779.109838	243.526579	2266.162996	1292.056680
25	Jacksonville	1760.547635	243.674968	2247.897572	1273.197699
26	Cleveland	1730.541270	264.677640	2259.896550	1201.185989
27	Miami	1700.863880	244.381927	2189.627733	1212.100027
28	SanFrancisco	1697.160801	259.049136	2215.259073	1179.062528
29	Baltimore	1674.032469	242.945619	2159.923708	1188.141230
30	Dallas	1560.968749	261.123272	2083.215292	1038.722206
31	Tennessee	1466.065707	260.513884	1987.093475	945.037938
32	SanDiego	1442.249840	253.612447	1949.474734	935.024947

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).