Results of pollock age-reader precision test against randomly selected samples from the first quarter of the 2016 NEFSC commercial samples. (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 production ages across the top and the test 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: 2016 Commercial Samples (Q1)   
Age Reader: JP Date Completed: October 2016
Number Aged: 620 Number Tested: 92
CV: 1.05% Agreement: 88.0%
Bowker's Test: Not significant


A. Agreement Plot

Pollock Agreement Plot

B. Age-Frequency Table

Test Production Age
Age 0 1 2 3 4 5 6 7 8 9 10 11 12 13 Total
Total 1 7 17 16 17 17 11 2 3 1 92
0
1
2
3
4 1 1
5 6 6
6 1 17 1 19
7 12 1 13
8 3 15 18
9 1 15 16
10 2 11 13
11 1 1
12 1 2 3
13 1 1 2


C. Results Summary

Production Age N N Agreed Percent Agreed Average Test Age
4 1 1 100 % 4.00
5 7 6 86 % 5.14
6 17 17 100 % 6.00
7 16 12 75 % 7.12
8 17 15 88 % 8.00
9 17 15 88 % 9.12
10 11 11 100 % 10.00
11 2 1 50 % 11.50
12 3 2 67 % 12.33
13 1 1 100 % 13.00


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