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2.4 STATISTICAL ANALYSIS <br /> Statistical analysis for the revegetation success criteria of total vegetation cover and total <br /> herbaceous production is required if the value of the sample mean from the reclamation areas <br /> is less than 90 percent of the value of the final revegetation success criterion for total <br /> vegetation cover or total herbaceous production. The 2019 reclaimed area sample means for <br /> total vegetation cover and total herbaceous production were greater than the corresponding <br /> revegetation success criterion; therefore no statistical analysis was required. A statistical <br /> analysis is not required for the evaluation of species composition. <br /> 2.5 SPECIES IDENTIFICATION AND VERIFICATION <br /> Species identification was accomplished in the field through the use of plant identification <br /> keys (Harrington, 1954, Weber, 1990; Whitson, 1987; Zimdahl, 1990, Stubbendieck, et al, <br /> 1995). In cases where plant identification was inconclusive in the field, voucher specimens <br /> were pressed for lab identification, and identification verified by Mr. Tim Hogan and Ms. <br /> Dina Clark of the University of Colorado, Boulder Herbarium. <br /> Mountain Coal Company,LLC West Elk Mine Page 6 <br /> 2019 Vegetation Report:West Bench,Sylvester Gulch,Shaft Canyon Road,and Saddle Road Reclamation Areas <br />