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	Team	Rating	Sigma	Upper_Bound	Lower_Bound
1	NewEngland	2758.065361	456.488753	3671.042866	1845.087855
2	Atlanta	2676.976635	460.476724	3597.930082	1756.023188
3	Denver	2663.215589	480.778475	3624.772539	1701.658639
4	Cincinnati	2663.215589	480.778475	3624.772539	1701.658639
5	GreenBay	2643.602842	472.028679	3587.660201	1699.545484
6	Arizona	2611.982531	477.287207	3566.556945	1657.408117
7	Carolina	2543.187691	495.477269	3534.142230	1552.233152
8	Oakland	2347.643906	429.432654	3206.509214	1488.778599
9	Pittsburgh	2299.030577	436.740458	3172.511492	1425.549661
10	Buffalo	2255.970671	446.740535	3149.451741	1362.489601
11	Cleveland	2215.446865	429.432654	3074.312173	1356.581557
12	Minnesota	2206.218218	440.545832	3087.309881	1325.126554
13	Dallas	2187.560302	463.949582	3115.459466	1259.661137
14	Jacksonville	1991.838465	444.849734	2881.537932	1102.138998
15	NewYorkG	1924.370150	441.351140	2807.072431	1041.667870
16	KansasCity	1905.229369	456.462763	2818.154895	992.303843
17	Houston	1880.969913	448.670805	2778.311523	983.628303
18	Indianapolis	1865.644310	442.242912	2750.130134	981.158487
19	SanDiego	1793.781782	440.545832	2674.873446	912.690119
20	Philadelphia	1780.020295	424.026164	2628.072622	931.967968
21	Seattle	1770.391036	461.081852	2692.554739	848.227333
22	SanFrancisco	1763.779856	448.955594	2661.691045	865.868668
23	Washington	1761.166966	421.837955	2604.842875	917.491057
24	StLouis	1700.969423	436.740458	2574.450339	827.488508
25	NewYorkJ	1692.240098	470.414300	2633.068699	751.411498
26	Miami	1689.503098	436.069254	2561.641606	817.364589
27	Tennessee	1681.023001	432.774518	2546.572036	815.473965
28	TampaBay	1613.536715	436.187291	2485.911297	741.162134
29	Detroit	1336.784411	480.778475	2298.341361	375.227461
30	Baltimore	1336.784411	480.778475	2298.341361	375.227461
31	NewOrleans	1323.297591	476.918369	2277.134330	369.460853
32	Chicago	1269.967136	461.081852	2192.130839	347.803433

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).