Results of yellowtail flounder age-reader precision test against randomly selected samples from the 2004 NEFSC commercial samples (all quarters combined), and the NEFSC 2004 autumn and 2005 spring bottom trawl surveys. (A) Age-bias plot, showing the average age attained during the test for fish of each production age. Error bars indicate 95% confidence intervals. (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 over-aged during the test; those below the shaded boxes were under-aged. Total age frequencies are given by age for both the test and production ages. (C) Results summary, indicating results of the test for each production age.

Species: Yellowtail Flounder Test Type: Precision
Sample Source: 2004 Commercial Samples (Q1-4),
2004 Autumn Survey (200407), &
2005 Spring Survey (200503) 		Age Reader: VS
Date Completed: June 2005 Sample Size: 100
CV: 6.64% Agreement: 71.0%
Bowker's test: Not significant


A. Age-Bias Plot

Yellowtail Flounder Age-Bias Plot

B. Age-Frequency Table

Prod Test Age
Age 0 1 2 3 4 5 6 7 Total
Total 3 25 46 18 7 1 100
0
1 2 2 4
2 1 20 3 24
3 3 34 2 39
4 9 11 1 21
5 5 4 9
6 2 2
7 1 1


C. Results Summary

Prod Age N N Agreed Percent Agreed Average Test Age
1 4 2 50 % 1.50
2 24 20 83 % 2.08
3 39 34 87 % 2.97
4 21 11 52 % 3.62
5 9 4 44 % 4.44
6 2 0 0 % 5.00
7 1 0 0 % 6.00


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