Results of winter flounder inter-reader precision test
using randomly selected samples from the 2007 NEFSC spring survey.
(A) Age-bias plot, showing the average age attained by GT versus the ages attained by JB.
Error bars indicate
95% confidence intervals. (B) Age-frequency table, showing each reader's ages. Numbers
in the shaded boxes indicate agreement between the two
readers. Numbers above this diagonal indicate fish which were given higher ages by GT; those
below the shaded boxes were given higher ages by JB. Total age
frequencies are given by age for both readers. (C) Results summary, indicating GT's results
relative to each of JB's ages.
| Species: |
Winter Flounder
| Test Type: |
Inter-reader Precision
| | Sample Source: |
2007 Spring Survey (200703)
| Age Structure: |
Otoliths
| | Age Reader: |
GT* vs. JB
| Date Completed: |
August 2007
| | Sample Size: |
477
| CV: |
3.15%
| | Agreement: |
86.0%
| Bowker's test: |
P = 0.003
| | *GT = trainee | | |
|
|
A. Age-Bias Plot
|
B. Age-Frequency Table
| Age | Age (GT) | | | (JB) | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | Total | | Total | | 33 | 57 | 143 | 127 | 74 | 35 | 7 | | 1 | 477 | | 0 | |
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| | | 1 |
| 32 |
6 |
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| 38 | | 2 |
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1 | 51 |
8 |
1 |
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| 61 | | 3 |
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| 119 |
10 |
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| 129 | | 4 |
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16 | 108 |
3 |
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| 127 | | 5 |
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8 | 63 |
1 |
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| 72 | | 6 |
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6 | 30 |
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| 36 | | 7 |
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2 |
3 | 6 |
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| 11 | | 8 |
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1 |
1 | |
| 2 | | 9 |
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| 1 | 1 |
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C. Results Summary
| Age (JB) |
N |
N Agreed |
Percent Agreed |
Ave Age (GT) | | 1 | 38 | 32 | 84 % | 1.16 | | 2 | 61 | 51 | 84 % | 2.15 | | 3 | 129 | 119 | 92 % | 3.08 | | 4 | 127 | 108 | 85 % | 3.90 | | 5 | 72 | 63 | 88 % | 4.90 | | 6 | 36 | 30 | 83 % | 5.83 | | 7 | 11 | 6 | 55 % | 6.36 | | 8 | 2 | 0 | 0 % | 6.50 | | 9 | 1 | 1 | 100 % | 9.00 |
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