Appendix C
Operator
’s Guide
RJS, Minneapolis, MN
003-4500
72
Table C-1 (Decodability percentage ranges to Numeric
and Letter Grades)
Min
Max
Numeric
Letter
62.00
100
4.0
A
60.80
61.99
3.9
A
59.60
60.79
3.8
A
58.40
59.59
3.7
A
57.20
58.39
3.6
A
56.00
57.19
3.5
A
54.80
55.99
3.4
B
53.60
54.79
3.3
B
52.40
53.59
3.2
B
51.20
52.39
3.1
B
50.00
51.19
3.0
B
48.70
49.99
2.9
B
47.40
48.69
2.8
B
46.10
47.39
2.7
B
44.80
46.09
2.6
B
43.50
44.79
2.5
B
42.20
43.49
2.4
C
40.90
42.19
2.3
C
39.60
40.89
2.2
C
38.30
39.59
2.1
C
37.00
38.29
2.0
C
35.80
36.99
1.9
C
34.60
35.79
1.8
C
33.40
34.59
1.7
C
32.20
33.39
1.6
C
31.00
32.19
1.5
C
29.80
30.99
1.4
D
28.60
29.79
1.3
D
27.40
28.59
1.2
D
26.20
27.39
1.1
D
25.00
26.19
1.0
D
22.50
24.99
0.9
D
20.00
22.49
0.8
D
17.50
19.99
0.7
D
15.00
17.49
0.6
D
12.50
14.99
0.5
D
10.00
12.49
0.4
F
7.50
9.99
0.3
F
5.00
7.49
0.2
F
2.50
4.99
0.1
F
0.00
2.49
0.0
F