Page 192 - Statistics and Data Analysis in Geology

Appendix

Table A.6. Critical values of Spearman's p for testing the significance
of a rank correlation. Table gives upper critical value of Spearman's p
for specified level of significance. Lower critical values are equal to -p.
Significance, ct, for One-tailed Test
.10 .05 -02 5 .01 .005 .001
Significance, a, for Two-tailed Test
.20 .10 .05 .02 .01 .002
n
4 .8000 .8000
5 .7000 .8000 .goo0 .goo0
6 .6000 ,7714 .8286 .8857 .9429
7 .5357 .6786 .7450 .8571 .8929 .9643
8 .so00 .6190 .7143 .8095 .8571 .9286
9 .4667 .5833 .6833 .7667 .8167 .g000
10 .4424 .5515 ,6364 .7333 .7818 .8667
11 .4182 .5273 .6091 .7000 .7455 .8364
12 .3986 .4965 .5804 .6713 .7273 .8182
13 .3791 .4780 .5 549 .6429 .6978 .7912
14 .3626 ,4593 .5341 .6220 .6747 .7670
15 .3500 .4429 .5179 .6000 .6536 .7464
16 .3382 .4265 ,5000 .5824 .6324 .7265
17 .3260 .4118 .4853 .5637 .6152 .7083
18 .3148 .3994 .4716 .5480 .5975 .6904
19 .3070 .3895 .4 5 79 .5333 .5825 .6737
20 .2977 .3789 .4451 .5203 .5684 .6586
21 .2909 .3688 .4351 .5078 ,5545 .6455
22 .2829 .3597 .4241 .4963 .5426 .6318
23 .2767 .3518 .4150 .4852 .5306 .6186
24 .2704 .3435 .4061 .4748 ,5200 .6070
25 .2646 ,3362 .3977 .4654 .5100 .5962
26 .2588 .3299 .3894 .4 5 64 .SO02 .5856
27 .2540 .3236 .3822 .4481 .4915 .5757
28 .2490 .3175 .3749 .4401 ,4828 .5660
29 .2443 .3113 .3685 .4320 .4 744 .5567
30 .2400 .3059 .3620 .4251 .4665 .5479

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