REV10935

• Permit No: C1981024
• IBM Index Class Name: Revision
• Doc Date: 5/7/1998
• Doc Name: sampling protocol
• From: GREYSTONE
• To: DMG
• Type & Sequence: SL3
• Media Type: D
• Archive: No

Table A-10
Colorado Coal Mine No. 1
1998 Reclaimed Area
Vegetation Production Estimation
RECLAIMED MINE SITE
Production Genera/ Descriptive Stat/stiu
1.0x0.5 M Quad Data Set by Rank and Pericantile
Sample grams Lbs.Acre Mean 542.52 Samp le Density Rank Percent
1 65.3 1163 Standard Error 58.96 46 103 1 0.00°,G
2 40.2 716 Median 420.23 5 135 2 2.04%
3 42.2 751 Mode 188.75 39 189 3 4.08%
4 64.5 1149 Standard Deviation 402.79 30 189 3 4.08%
5 7.6 135 Variance 162243.44 27 191 5 8.16%
6 19.4 345 Kurtosis 2.11 33 198 6 10.20%
7 13.8 246 Skewness 1.60 24 199 7 12.24%
B 63.7 1134 Range 1709.41 12 212 8 14.29%
9 36.9 693 Minimum - 103.28 3B - 235 9 16.33%
10 45 801 Maximum 1812.69 22 242 10 18.37%
11 35 623 Sum 27126.19 7 246 11 20.41%
12 11.9 212 Count 50.00 16 251 12 22.45%
13 31.6 563 Confidence Level(0.90) 93.70 19 256 13 24.49%
14 26 463 34 258 14 26.53°h
15 41.4 737 Estimate Lower CI per Gilbert: 29 292 15 28.57°,6
16 14.1 251 I=p(n+1)-Z[(np(1-p)]1/2 25 294 16 30.61%
17 24.2 431 36 304 17 32.65°h
18 17.6 313 where p = 0.5 18 313 18 34.69%
19 14.4 256 n = 50 43 319 19 36.73%
20 22 392 Z = 1.2816 41 326 20 38.78%
21 81.9 1458 then the Lower Cl is defined by the 50 329 21 40.82°/.
22 13.6 242 21 st ranked sample of the data sat 6 345 22 42.86%
23 27.9 497 20 392 23 44.90°.6
24 11.2 199 26 397 24 46.94%
25 16.5 294 Interpolation to determine the 21st 37 410 25 48.98%
26 22.3 397 ranked sample Irom the data set: 17 431 26 51.02%
27 10.7 191 The data presented by rank and percentile 45 440 27 53.06%
28 25.1 447 is ordered by rank from lowest density 28 447 28 55.10°,6
29 16.4 292 to highest density. 14 463 29 57.14%
30 10.6 189 Since the lower confidence limit (329) is 35 493 30 59.18°d,
31 42.2 751 greater than the success standard (238.1), 23 497 31 61.22%
32 32.7 582 the median (420.2) is greater than the success 47 552 32 63.27%
33 11.1 198 standard at the 90% confidence level. 13 563 33 65.31%
34 14.5 258 49 577 34 67.35°,6
35 27.7 493 4B 579 35 69.39%
36 17.1 304 32 582 36 71.43%
37 23 410 11 623 37 73.47%
38 13.2 235 9 693 38 75.51%
39 10.6 169 2 716 39 77.55%
40 101.8 1813 15 737 40 79.59%
41 18.3 326 31 751 41 81.63%
42 81.7 1455 3 751 41 81.63%
43 17.9 319 10 801 43 85.71°,6
44 91.7 1633 8 1134 44 87.76%
45 24.7 440 4 1149 45 89.80%
46 5.8 103 1 1163 46 91.84%
47 31 552 42 1455 47 93.88%
4B 32.5 579 21 1458 48 95.92%
49 32.4 577 44 1633 49 97.96%
50 18.5 329 40 1813 50 100.00%
A-17