Results of Atlantic herring inter-reader precision test
using randomly selected samples from the 2007 NEFSC winter survey.
(A) Age-bias plot, showing the average age attained by SE versus the ages attained by BJ.
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 SE; those
below the shaded boxes were given higher ages by BJ. Total age
frequencies are given by age for both readers. (C) Results summary, indicating SE's results
relative to each of BJ's ages.
| Species: |
Atlantic Herring
| Test Type: |
Inter-reader Precision
| | Sample Source: |
2007 Winter Survey (200702)
| Age Reader: |
SE* vs. BJ
| | Date Completed: |
July 2007
| Sample Size: |
451
| | CV: |
1.92%
| Agreement: |
85.4%
| | Bowker's test: |
Not significant
| | *SE = trainee
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A. Age-Bias Plot
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B. Age-Frequency Table
| Age | Age (SE) | | | (BJ) | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | Total | | Total | | | 16 | 56 | 73 | 125 | 101 | 40 | 25 | 13 | 2 | 451 | | 0 | |
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| 16 |
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| 16 | | 3 |
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| 54 |
2 |
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| 56 | | 4 |
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2 | 67 |
5 |
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| 74 | | 5 |
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3 | 104 |
6 |
1 |
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| 114 | | 6 |
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1 |
16 | 87 |
6 |
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| 110 | | 7 |
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6 | 26 |
4 |
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| 36 | | 8 |
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2 |
6 | 20 |
2 |
| 30 | | 9 |
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1 |
1 | 10 |
1 | 13 | | 10 |
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1 | 1 | 2 |
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C. Results Summary
| Age (BJ) |
N |
N Agreed |
Percent Agreed |
Average Age (SE) | | 2 | 16 | 16 | 100 % | 2.00 | | 3 | 56 | 54 | 96 % | 3.04 | | 4 | 74 | 67 | 91 % | 4.04 | | 5 | 114 | 104 | 91 % | 5.04 | | 6 | 110 | 87 | 79 % | 5.89 | | 7 | 36 | 26 | 72 % | 6.94 | | 8 | 30 | 20 | 67 % | 7.73 | | 9 | 13 | 10 | 77 % | 8.85 | | 10 | 2 | 1 | 50 % | 9.50 |
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