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95% prediction intervals for the spatial averages of chromium traces over the rectangular blocks in Table 6.
| block | plug-in | indirectly calibrated | directly calibrated |
|---|---|---|---|
|
| |||
| 1 | (31.04, 46.66) | (30.90, 46.79) | (30.90, 46.78) |
| 2 | (35.34, 44.04) | (35.25, 44.14) | (35.24, 44.13) |
| 3 | (32.90, 46.64) | (32.67, 49.88) | (32.66, 46.85) |
| 4 | (22.24, 29.58) | (21.16, 29.66) | (22.17, 29.65) |
