Results of silver hake inter-reader precision test using randomly selected samples from the 2004 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 NS; those below the shaded boxes were given higher ages by KL. Total age frequencies are given by age for both readers. (C) Results summary, indicating KL's results relative to each of NS's ages.

Species: Silver Hake Test Type: Inter-reader Precision
Sample Source: 2004 Spring Survey (200402)   
Age Reader: KL* vs. NS Date Completed: October 2005
Number Aged: 1076 Number Tested: 99
CV: 5.21% Agreement: 76.8%
Bowker's Test: P = 0.002
  *KL aged this year's samples in lieu of the the primary reader (NS).


A. Agreement Plot

Silver Hake Agreement Plot

B. Age-Frequency Table

Age Age (NS)
(KL) 0 1 2 3 4 5 6 Total
Total 9 41 22 24 3   99
0
1 8 1 9
2 1 39 1 41
3 1 21 16 38
4   7   7
5 1 1   2
6 2 2


C. Results Summary

Age (NS) N N Agreed Percent Agreed Average Age (KL)
1 9 8 89 % 1.11
2 41 39 95 % 2.00
3 22 21 95 % 2.95
4 24 7 29 % 3.38
5 3 1 33 % 5.67


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(File Modified Nov. 08 2013)