GENERAL54474

• Permit No: C1980002
• IBM Index Class Name: General Documents
• Doc Date: 1/26/2006
• Doc Name: Vegetation Sample Results
• From: Dan Mathews
• To: Jim Stark, Sandy Brown
• Permit Index Doc Type: Vegetation
• Media Type: D
• Archive: No

Count
Bag # i meter sq. 4x Conversion Factor Grams per meter sq.
49 7-1 205.8
50 11-7 11.1
51 1-6 120.4
52 '5-5? 41.3
53 7-3 25.3
54 5-1 94.1
55 16-2 185.8
56 4-1 64.3
57 6-8 191.4
' 58 11-5 192.6
59 12-2 102.6
60 7-7 104.0
61 7-5 61.3
62 4-2 73.3
' 63 12-4 65.9
64 11-3 69.1
' 65 10-4 298.3
' 66 8-2 269.9
~ 67 13-3 56.8
68 10-6 136.8
69 1-1 29.1
' 70 8-6 60.8
71 8-4 115.5
72 9-5 137.1
73
' 10-2 119.2
Sample Mean 134.0
Sample Median 113.2
Sample Variance 9359.4
Sample Std. Deviation 96.7
Sample size 73
Table T (0.10, n-1 df) 1.294
Table T (0.20, n-1 df) 0.847
Required sample size (nmin) 87
Production Standard 125 g/sq.m
90% of standard (in g/sq.m) 112.5
Standard Error 11.3
Reverse Null T-test
Tcalc 1.896
Ttable 0.847
Since Tcalc is greater than Ttable, the null hypothesis of failure is rejected. The conclusion is
that production has been demonstrated to exceed the standard, at the 80% level of confidence.
Note, the quarter meter plot samples were in the pond/topsoil stockpile area, a relatively more uniform
stand dominated by smooth brome.
The 1 square meter plot samples were in the larger, primary mine disturbance area, a more variable,
lower productivity stand.