Results of pollock age-reader precision test against randomly selected samples from the 2012 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 over-aged during the test; those below the shaded boxes were under-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: Pollock Test Type: Precision
Sample Source: 2012 Autumn Survey (201204)   
Age Reader: WD Date Completed: January 2014
Number Aged: 212 Number Tested: 49
CV: 2.12% Agreement: 93.9%
Bowker's Test: Not applicable


A. Agreement Plot

Pollock Agreement Plot

B. Age-Frequency Table

Test Production Age
Age 0 1 2 3 4 5 6 7 8 9 Total
Total 11 11 6 5 7 5 2 1 1 49
0
1 9 9
2 2 11 13
3 6 6
4 5 5
5 7 7
6 5 5
7 1 1
8 1 1 2
9 1 1



C. Results Summary

Production Age N N Agreed Percent Agreed Average Test Age
1 11 9 82 % 1.18
2 11 11 100 % 2.00
3 6 6 100 % 3.00
4 5 5 100 % 4.00
5 7 7 100 % 5.00
6 5 5 100 % 6.00
7 2 1 50 % 7.50
8 1 1 100 % 8.00
9 1 1 100 % 9.00


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