dreamresearch.net To find an h score from two percentages, simply look up both percentages in this table and find the difference between their corresponding X's. For instance, scores of 50% and 25% yield an h of 1.571 - 1.047 = .524.

% X % X % X % X
0 0.000 25 1.047 50 1.571 75 2.094
1 0.200 26 1.070 51 1.591 76 2.118
2 0.284 27 1.093 52 1.611 77 2.141
3 0.348 28 1.115 53 1.631 78 2.165
4 0.403 29 1.137 54 1.651 79 2.190
5 0.451 30 1.159 55 1.671 80 2.214
6 0.495 31 1.181 56 1.691 81 2.240
7 0.536 32 1.203 57 1.711 82 2.265
8 0.574 33 1.224 58 1.731 83 2.292
9 0.609 34 1.245 59 1.752 84 2.319
10 0.644 35 1.266 60 1.772 85 2.346
11 0.676 36 1.287 61 1.793 86 2.375
12 0.707 37 1.308 62 1.813 87 2.404
13 0.738 38 1.328 63 1.834 88 2.434
14 0.767 39 1.349 64 1.855 89 2.465
15 0.795 40 1.369 65 1.875 90 2.498
16 0.823 41 1.390 66 1.897 91 2.532
17 0.850 42 1.410 67 1.918 92 2.568
18 0.876 43 1.430 68 1.939 93 2.606
19 0.902 44 1.451 69 1.961 94 2.647
20 0.927 45 1.471 70 1.982 95 2.691
21 0.952 46 1.491 71 2.004 96 2.739
22 0.976 47 1.511 72 2.026 97 2.793
23 1.000 48 1.531 73 2.049 98 2.858
24 1.024 49 1.551 74 2.071 99 2.941

You can also find X and h by using a mathematical formula. The formula is: X is the anticosine (using radians) of 1 - 2*p, where p is a number from 0 to 1 (not 0 to 100). h is simply the difference between the two X's:

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