Results of cod inter-reader precision test using randomly selected samples from the 2004 NEFSC autumn survey (Gulf of Maine stock only). (A) Agreement plot, showing the ages attained byeach 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 ages. Numbers above this diagonal indicate fish which were given higher ages by NS; those below the shaded boxes were given higher ages by NM. Total age frequencies are given by age for both readers. (C) Results summary, indicating NM's results relative to each of NS's ages.

Species: Cod Test Type: Inter-reader Precision
Sample Source: 2004 Autumn Survey (200407) Stock Area: Gulf of Maine
Age Reader: NM* vs. NS Date Completed: February 2005
Number Aged: 174 Number Tested: 60
CV: 0.00% Agreement: 100.0%
Bowker's test: Not applicable
  *NM aged this year's samples in lieu of the the primary reader (NS). NM was the previous primary age reader.


A. Agreement Plot

Cod Agreement Plot

B. Age-Frequency Table

Age Age (NS)
(NM) 0 1 2 3 4 5 6 7 8 9 10 Total
Total 11 2 12 10 13 8 2 1 1 60
0
1 11 11
2 2 2
3 12 12
4 10 10
5 13 13
6 8 8
7 2 2
8 1 1
9
10 1 1


C. Results Summary

Age (NS) N N Agreed Percent Agreed Average Age (NM)
1 11 11 100 % 1.00
2 2 2 100 % 2.00
3 12 12 100 % 3.00
4 10 10 100 % 4.00
5 13 13 100 % 5.00
6 8 8 100 % 6.00
7 2 2 100 % 7.00
8 1 1 100 % 8.00
9
10 1 1 100 % 10.00


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