PERMFILE58849

• Permit No: C1982057
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Doc Name: 1990 VEGETATION BASELINE REPORT SENECA II-W MINE & EXPANSION AREAS
• Section_Exhibit Name: TAB 10 APPENDIX 10-9
• Media Type: D
• Archive: No

• Statistical Methods
Sample adequacy calculations were carried out using the formula prescribed by CMLRD (1988):
Nmin =
t2 s2
d2 x2
where:
t 1.645 (two-tailed t-value with infinite degrees of freedom at probability level 0.10)
s2 sample variance (based sn-1)
d = 0.1 (level of precision or desired detectable reduction)
x =sample mean
Comparison of Expansion Area cover to cover within the same types in the existing Seneca II-W Permit
Area was accomplished using the formula set forth on page 16 in CMLRD (1988).
Ix) - xil
• tc
~ sp2 / n) +sp2 / ni
where
x) = Expansion area cover sample mean
xi Permit area cover sample mean
n) = Expansion area sample size
ni Permit area sample size
tc Calculated t value
(n) -1) (s2)) + (ni -1) (s2i)
sp2 =Pooled sample variance =
1 ~
Floristic Analysis
. All plants observed during field studies were noted, and where any question as to their identity existed,
4