Table 8 Table of frequencies (total and individual per metal coupon) for permanent, temporary and unsuitable ratings made by each institution irrespective of the testing material
From: Review and interlaboratory comparison of the Oddy test methodology
Institution | Total | Silver | Copper | Lead | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
P | T | U | P | T | U | P | T | U | P | T | U | |
I | 16 | 6 | 8 | 8 | 1 | 1 | 3 | 3 | 4 | 5 | 2 | 3 |
II | 6 | 11 | 13 | 6 | 2 | 2 | 0 | 6 | 4 | 0 | 3 | 7 |
III | 13 | 9 | 8 | 8 | 1 | 1 | 2 | 6 | 2 | 3 | 2 | 5 |
IV | 21 | 4 | 5 | 9 | 1 | 0 | 8 | 0 | 2 | 4 | 3 | 3 |
V | 18 | 8 | 4 | 10 | 0 | 0 | 6 | 2 | 2 | 2 | 6 | 2 |
VI | 18 | 5 | 7 | 7 | 2 | 1 | 6 | 1 | 3 | 5 | 2 | 3 |
VII | 22 | 2 | 6 | 10 | 0 | 0 | 8 | 0 | 2 | 4 | 2 | 4 |
Average | 16.3 | 6.4 | 7.3 | 8.3 | 1.0 | 0.7 | 4.7 | 2.6 | 2.7 | 3.3 | 2.9 | 3.9 |
Standard deviation | 5.4 | 3.1 | 2.9 | 1.50 | 0.82 | 0.76 | 3.09 | 2.57 | 0.95 | 1.80 | 1.46 | 1.68 |