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	Team	Rating	Sigma	Upper_Bound	Lower_Bound
1	Denver	2857.562549	411.733951	3681.030452	2034.094647
2	Atlanta	2818.959872	405.039077	3629.038027	2008.881718
3	Cincinnati	2817.718611	420.685112	3659.088834	1976.348388
4	NewEngland	2810.987379	432.684610	3676.356599	1945.618159
5	GreenBay	2807.572752	409.428851	3626.430455	1988.715050
6	Carolina	2615.109856	464.201635	3543.513125	1686.706587
7	NewYorkG	2281.071731	362.455160	3005.982050	1556.161412
8	Indianapolis	2210.017180	361.380441	2932.778061	1487.256299
9	Arizona	2189.125822	384.968341	2959.062504	1419.189140
10	Buffalo	2094.991562	361.395308	2817.782177	1372.200946
11	Pittsburgh	2094.103849	341.087684	2776.279218	1411.928480
12	Minnesota	2091.311777	406.520086	2904.351948	1278.271605
13	Cleveland	2073.906282	345.585668	2765.077619	1382.734946
14	StLouis	2023.039198	358.939676	2740.918549	1305.159847
15	Chicago	1937.546155	352.763580	2643.073315	1232.018995
16	NewYorkJ	1913.978147	414.889211	2743.756568	1084.199725
17	Washington	1901.764020	360.631711	2623.027442	1180.500598
18	SanDiego	1886.915174	344.174507	2575.264189	1198.566160
19	Oakland	1876.708241	356.937050	2590.582340	1162.834142
20	Seattle	1841.138203	400.313153	2641.764510	1040.511897
21	TampaBay	1786.597000	367.234274	2521.065548	1052.128452
22	Philadelphia	1777.083597	342.383500	2461.850598	1092.316596
23	Dallas	1731.230381	382.974310	2497.179001	965.281761
24	Houston	1670.857815	382.818191	2436.494197	905.221433
25	Baltimore	1665.389326	364.219463	2393.828252	936.950401
26	KansasCity	1615.912218	378.784492	2373.481201	858.343234
27	SanFrancisco	1595.761656	390.595607	2376.952871	814.570441
28	Jacksonville	1557.329734	353.396636	2264.123007	850.536462
29	NewOrleans	1546.039622	360.004840	2266.049303	826.029941
30	Tennessee	1540.039166	391.857868	2323.754902	756.323429
31	Miami	1498.955096	392.259799	2283.474694	714.435499
32	Detroit	1145.202373	414.509758	1974.221890	316.182856

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).