2018-01-03_PERMIT FILE - C1981010A ‎(12)‎

• Permit No: C1981010A
• IBM Index Class Name: Permit File
• Doc Date: 1/3/2018
• Doc Name: pages 2-58 to 2-169
• Section_Exhibit Name: 2.3 Vegetation & 2.4 Fish and Wildlife
• Media Type: D
• Archive: Yes

Table 2.3-10. Comparison of production sample means from each range site within a vegetation type based
on 1979 data to determine if unique populations exist.
•
Esti- Differ-
Standard
ifferStandard mate ence t cal- t Test
Vegetation deviation of Mean (d) culated stat @ Conclusion (Accept,
type n (s) (X)(1) Xi - XJ (2) = 0.05(3) Reject) (4)
Mountain shrub
Range site 1 16 63.7 Cannot reject the null hy-
VS 2302.48 11.7 .9778 2.131 pothesis, that 1 and 2 are
Range site 2 16 75.4 equal at the .05 level of
statistical confidence.
Range site 1 16 63.7 Reject the null hypothesis
VS 935.41 28.3 3.7012 2.131 that 1 and 3 are equal
Range site 3 16 35.4 at the .05 level of
statistical confidence.
Range site 2 Reject that 2 and 3 are
VS equal based on a comparison
Range site 3 of the means and on the two
previous calculations.
Sagebrush -grass
Range site 4 27 48.6 Cannot reject the null hy-
VS 1,228.94 7.7 1.1393 2.056 pothesis, that 4 and 5 are
Range site 5 27 40.9 equal at the .05 level of
statistical confidence.
(1)2 �dK - (lL dK)2 where: sd = The variance of the individual differences between
s = n the ith and jth groups.
d [1-1 dk = The square of the individual differences between
the ith and jth groups.
n = The amber of pairs of plots sampled.
(2)t = M - Y.
n
sd
n
(3) From Freese, 1967.
where: X. = The mean of Xi.
X. = The mean of X..
J J
(4) Null Hypothesis: %41 =%A2 Alternate Hypothesis: A #/112
/A1-,LA3 -1"'IA3
`.
IA -k4 -'A 5 4 #"u 5
2-96