Results of white hake age-reader precision test against randomly selected samples from the 2017 NEFSC spring survey (Eastern Gulf of Maine stock only). (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 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: White Hake Test Type: Precision
Sample Source: 2017 Spring Survey (201702) Stock Area: Eastern Gulf of Maine
Age Reader: JP Date Completed: January 2018
Number Aged: 366 Number Tested: 73
CV: 0.28% Agreement: 98.6%
Bowker's Test: Not applicable


A. Agreement Plot

White Hake Agreement Plot

B. Age-Frequency Table

Test Production Age
Age 0 1 2 3 4 5 6 7 8 Total
Total 1 14 20 18 13 5 2 73
0                  
1    
2   1 1
3   13 13
4   1 20 21
5   18 18
6   13 13
7   5 5
8   2 2


C. Results Summary

Production Age N N Agreed Percent Agreed Average Test Age
2 1 1 100% 2.00
3 14 13 93% 3.07
4 20 20 100% 4.00
5 18 18 100% 5.00
6 13 13 100% 6.00
7 5 5 100% 7.00
8 2 2 100% 8.00


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(File Modified Jan. 30 2018)