Results of summer flounder age-reader precision test against randomly selected samples from the third quarter of the 2009 NEFSC commercial samples. Scales were used for age determinations. (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: Summer Flounder Test Type: Precision
Sample Source: 2009 Commercial Samples (Q3) Structure: Scales
Age Reader: BJ Date Completed: April 2010
Number Aged: 1505 Number Tested: 119
CV: 3.81% Agreement: 84.0%
Bowker's Test: P = 0.016    


A. Agreement Plot

Summer Flounder Agreement Plot

B. Age-Frequency Table

Test Production Age
Age 0 1 2 3 4 5 6 7 Total
Total 21 23 17 31 22 2 3 119
0
1 17   17
2 4 23 1 28
3   15 5 20
4 1 21   22
5 5 20   25
6 2 2 1 5
7   2 2


C. Results Summary

Production Age N N Agreed Percent Agreed Average Test Age
1 21 17 81 % 1.19
2 23 23 100 % 2.00
3 17 15 88 % 3.00
4 31 21 68 % 4.00
5 22 20 91 % 5.09
6 2 2 100 % 6.00
7 3 2 67 % 6.67


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