There were 97 reservation
sites with sufficient measurements of H2S to compute T-Tests. The number showing significant trends was
less dramatic, but still more than could be expected by chance. Of the sites showing significant trends,
upward trends predominated, and the dominance was more than could be explained
by chance. Results for H2 S trends at reservation sites are
summarized in Table 4.
Table 6. Summary of T-Test
results, H2S for 97 sites on the Southern Ute Reservation.
|
Significance Level |
U
Number
of Sites with Upward Trend |
D
Number
of Sites with Downward Trend |
U+D
Number
of Sites with Any Trend |
Expected
Number of Sites with Any Trend |
Probability
of U out of U+D Sites Increasing (see
Note 1) |
Probability
of U+D Sites with Any Trend (see
Note 2) |
|||
|
99.9% |
3 |
0 |
3 |
0 |
0.125 |
1.37E-04 |
|
||
|
99.0% |
7 |
0 |
7 |
1 |
0.008 |
5.85E-05 |
|
||
|
95.0% |
10 |
2 |
12 |
5 |
0.019 |
3.33E-03 |
|
||