Results of witch flounder age-reader precision test
against randomly selected samples from the 2013 NEFSC autumn survey.
(A) Agreement plot, showing both the production and test ages. A small amount of noise was added to the data to improve visibility of overlapping data points. (B) Age-frequency table, showing the test ages across the top and the production ages on the
left. Numbers in the shaded boxes indicate agreement between the two
ages. Numbers above this diagonal indicate fish which were under-aged during
the test; those below the shaded boxes were over-aged. Total age
frequencies are given by age for both the test and
production ages. (C) Results summary, indicating results of the test
for each production age.
| Species: |
Witch Flounder
| Test Type: |
Precision
| | Sample Source: |
2013 Autumn Survey (201304)
| | |
| Age Reader: |
SE |
Date Completed: |
June 2014 |
| Number Aged: |
381 |
Number Tested: |
78 | | CV: |
1.02%
| Agreement: |
92.3%
| | Bowker's Test: |
Not applicable
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A. Agreement Plot
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B. Age-Frequency Table
| Test | Production Age | | | Age | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | Total | | Total | 9 | 9 | 11 | 9 | 11 | 11 | | 7 | 7 | 3 | 1 | 78 | | 0 | 9 |
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| 9 | | 1 |
| 9 |
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| 9 | | 2 |
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| 11 |
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| 11 | | 3 |
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| 8 |
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| 8 | | 4 |
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1 | 10 |
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| 11 | | 5 |
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1 | 9 |
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| 10 | | 6 |
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| 2 | | 7 |
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| 7 |
1 |
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| 8 | | 8 |
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| 6 |
1 |
| 7 | | 9 |
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| 2 | | 10 |
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| 1 | 1 |
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C. Results Summary
| Production Age |
N |
N Agreed |
Percent Agreed |
Average Test Age | | 0 | 9 | 9 | 100 % | 0.00 | | 1 | 9 | 9 | 100 % | 1.00 | | 2 | 11 | 11 | 100 % | 2.00 | | 3 | 9 | 8 | 89 % | 3.11 | | 4 | 11 | 10 | 91 % | 4.09 | | 5 | 11 | 9 | 82 % | 5.18 | | 6 | | | | | | 7 | 7 | 7 | 100 % | 7.00 | | 8 | 7 | 6 | 86 % | 7.86 | | 9 | 3 | 2 | 67 % | 8.67 | | 10 | 1 | 1 | 100 % | 10.00 |
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