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

Species: Yellowtail Flounder Test Type: Inter-reader Precision
Sample Source: 2004 Canadian (DFO) Commercial Samples
Age Reader: SP* vs. VS Date Completed: January 2005
Number Aged: 162 Number Tested: 162
CV: 4.83% Agreement: 74.7%
Bowker's Test: Not significant
  *SP = trainee


A. Agreement plot

Yellowtail Flounder Agreement Plot

B. Age-Frequency Table

Age Age (VS)
(SP) 0 1 2 3 4 5 6 7 8 9 Total
Total 1 31 50 35 23 7 7 4 4 162
0
1
2 1 29 3 33
3 2 43 8 53
4 4 26 6 1 37
5 1 15 2 1 19
6 2 4 4 3 13
7 2 1 3
8 1 2 3
9 1 1


C. Results Summary

Age (VS) N N Agreed Percent Agreed Average Age (SP)
1 1 0 0 % 2.00
2 31 29 94 % 2.06
3 50 43 86 % 3.02
4 35 26 74 % 3.80
5 23 15 65 % 4.83
6 7 4 57 % 5.43
7 7 2 29 % 6.14
8 4 1 25 % 6.50
9 4 1 25 % 8.00


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(File Modified Nov. 08 2013)