| Class lower limits |
Midclass |
Class upper limits |
Freq f |
RF |
Low |
Mid |
High |
|
| 13 |
15.5 |
18 |
4 |
0.02 |
0.26 |
0.31 |
0.36 |
|
| 18 |
19.5 |
21 |
22 |
0.11 |
1.98 |
2.15 |
2.31 |
|
| 22 |
23.5 |
25 |
37 |
0.19 |
4.07 |
4.35 |
4.63 |
|
| 26 |
27 |
28 |
30 |
0.15 |
3.9 |
4.05 |
4.2 |
|
| 29 |
32 |
35 |
40 |
0.2 |
5.8 |
6.4 |
7 |
|
| 36 |
40.5 |
45 |
27 |
0.14 |
4.86 |
5.47 |
6.08 |
|
| 46 |
55.5 |
65 |
40 |
0.2 |
9.2 |
11.1 |
13 |
|
|
|
|
200 |
1 |
30.07 |
33.82 |
37.57 |
|
|
| +1 Chose coherent bins |
|
|
|
|
|
|
|
|
| +1 Correct frequencies ( 4, 22, 37, 30, 40, 27, 40) |
|
|
|
|
|
|
|
|
| +1 Correct sample size (200) |
|
|
|
|
|
|
|
|
| +1 Correct relative frequencies |
|
|
|
|
|
|
|
|
| +1 Correct relative frequency sum (1.00) |
|
|
|
|
|
|
|
|
| +2 Mean age between 30 and 38 |
|
|
|
|
|
|
|
|
| 7 points |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| +1 Mean age quoted as a range (between 30 and 38) |
|
|
|
|
|
|
|
|
