Results of scup inter-reader precision test using randomly selected samples from the 2014 NEFSC autumn 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 DC; those below the shaded boxes were given higher ages by NC. Total age frequencies are given by age for both readers. (C) Results summary, indicating NC's results relative to each of DC's ages.

Species: Scup Test Type: Inter-reader Precision
Sample Source: 2014 Autumn Survey (201404)   
Age Reader: NC* vs. DC Date Completed: February 2015
Number Aged: 366 Number Tested: 59
CV: 1.57% Agreement: 89.8%
Bowker's Test: Not significant
  *NC = trainee


A. Agreement Plot

Scup Agreement Plot

B. Age-Frequency Table

Age Age (DC)
(NC) 0 1 2 3 4 5 6 7 Total
Total 13 14 9 8 8 4 2 1 59
0 13 13
1 14 14
2 9 9
3 8 2 10
4 5 5
5 1 3 1 5
6 1 1 1 3
7


C. Results Summary

Age (DC) N N Agreed Percent Agreed Average Age (NC)
0 13 13 100 % 0.00
1 14 14 100 % 1.00
2 9 9 100 % 2.00
3 8 8 100 % 3.00
4 8 5 62 % 3.88
5 4 3 75 % 5.25
6 2 1 50 % 5.50
7 1 0 0 % 6.00


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(File Modified Feb. 04 2015)