Results of witch flounder inter-reader precision test against randomly selected samples from the 2009 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 the test ages across the top and the production ages on the left. Numbers in the shaded boxes indicate agreement between the two ages. Numbers above this diagonal indicate fish which were given higher ages by JB; those below the shaded boxes were given higher ages by SE. Total age frequencies are given by age for both readers. (C) Results summary, indicating SE's results relative to each of JB's ages.

Species: Witch Flounder Test Type: Inter-reader Precision
Sample Source: 2009 Spring Survey (200902)   
Age Reader: SE* vs JB Date Completed: December 2010
Number Aged: 698 Number Tested: 251
CV: 1.21% Agreement: 89.2%
Bowker's Test: Not significant
  *SE= trainee


A. Agreement plot

Witch Flounder Agreement Plot

B. Age-Frequency Table

Age Age (JB)
(SE) 0 1 2 3 4 5 6 7 8 9 10 11 12 13 Total
Total 2 6 12 36 55 34 27 34 27 13 3 1 1 251
0
1 2 2
2 6 6
3 12 12
4 35 7 42
5 1 47 1 49
6 1 32 2 35
7 1 25 1 27
8 27 4 31
9 6 21 27
10 1 13 14
11 1 3 4
12 1 1 2
13


C. Results Summary

Age (JB) N N Agreed Percent Agreed Average Age (SE)
1 2 2 100 % 1.00
2 6 6 100 % 2.00
3 12 12 100 % 3.00
4 36 35 97 % 4.03
5 55 47 85 % 4.89
6 34 32 94 % 6.00
7 27 25 93 % 6.93
8 34 27 79 % 8.15
9 27 21 78 % 8.96
10 13 13 100 % 10.00
11 3 3 100 % 11.00
12 1 1 100 % 12.00
13 1 0 0 % 12.00


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(File Modified Nov. 08 2013)