Group | n | Mean age (S.D) | Mean CTR (S.D) | Correlation coefficient ( r) | Sig.* |
---|---|---|---|---|---|
I | 38 | 5.69 (0.79) | 2.923 (0.61) | −0.713 | 0.000 |
II | 38 | 8.62 (0.84) | 1.940 (0.19) | −0.655 | 0.000 |
III | 37 | 11.5 (0.81) | 1.535 (0.16) | −0.588 | 0.000 |
IV | 32 | 13.92 (0.61) | 1.19 (0.18) | −0.718 | 0.000 |
Total | 145 | 9.75 (3.14) | 1.930 (0.73) | −0.898 | 0.000 |