Results of pollock inter-reader precision test against randomly selected samples from the 2013 NEFSC spring survey. (A) Agreement plot, showing the ages attained by each reader. A small amount of noise was added to the data to improve visibility of overlapping data points. (B) Age-frequency table, showing each reader's ages. Numbers in the shaded boxes indicate agreement between the two readers. Numbers above this diagonal indicate fish which were given higher ages by WD; those below the shaded boxes were given higher ages by JP. Total age frequencies are given by age for both readers. (C) Results summary, indicating JP's results relative to each of WD's ages.

Species: Pollock Test Type: Inter-reader Precision
Sample Source: 2013 Spring Survey (201302)
Age Reader: JP* vs. WD Date Completed: July 2014
Number Aged: 162 Number Tested: 50
CV: 7.22% Agreement: 62.0%
Bowker's Test: Not significant
  *JP = trainee


A. Agreement Plot

Pollock Agreement Plot

B. Age-Frequency Table

Age Age (WD)
(JP) 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Total
Total 1 9 10 6 3 7 5 5 2 1 1 50
0
1 1 1 2
2 8 7 15
3 3 3
4 5 1 6
5 1 2 3
6 6 2 8
7 1 3 2 6
8 3 2 5
9
10 1 1
11
12
13
14 1 1
15
16


C. Results Summary

Age (WD) N N Agreed Percent Agreed Average Age (JP)
1 1 1 100 % 1.00
2 9 8 89 % 1.89
3 10 3 30 % 2.30
4 6 5 83 % 4.17
5 3 2 67 % 4.67
6 7 6 86 % 6.14
7 5 3 60 % 6.60
8 5 3 60 % 7.60
9 2 0 0 % 8.00
10
11 1 0 0 % 10.00
12
13
14
15
16 1 0 0 % 14.00


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