Results of yellowtail flounder inter-reader precision test using randomly selected samples from the second quarter of the 2008 NEFSC commercial samples. (A) Age-bias plot, showing the average age attained by SE versus the ages attained by SM. Error bars indicate 95% confidence intervals. (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 SE; those below the shaded boxes were given higher ages by SM. Total age frequencies are given by age for both readers. (C) Results summary, indicating SE's results relative to each of SM's ages.

Species: Yellowtail Flounder Test Type: Inter-reader Precision
Sample Source: 2008 Commercial Samples (Q2) Age Reader: SE* vs. SM**
Date Completed: March 2009 Sample Size: 99
CV: 3.12% Agreement: 82.8%
Bowker's test: Not significant
  *SE = trainee.
  **SP married to become SM early in 2009.


A. Age-Bias Plot

Yellowtail Flounder Age-Bias Plot

B. Age-Frequency Table

Age Test Age (SE)
(SM) 0 1 2 3 4 5 6 Total
Total 43 47 7 2 99
0
1
2
3 37 4 41
4 6 39 2 47
5 4 4 8
6 1 2 3


C. Results Summary

Age (SM) N N Agreed Percent Agreed Average Age (SE)
3 41 37 90 % 3.10
4 47 39 83 % 3.91
5 8 4 50 % 4.50
6 3 2 67 % 5.67


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(Modified May. 13 2009)