Table 3 Correlation analysis of element content and color in group 1.
Si | Fe | Ca | K | Mn | Cu | Al | ||
|---|---|---|---|---|---|---|---|---|
Number of cases | 14 | 14 | 14 | 14 | 14 | 14 | 14 | |
L | r | 0.169 | − 0.625* | −0.069 | 0.276 | − 0.657* | −0.466 | 0.526 |
Sig. | 0.563 | 0.017 | 0.814 | 0.34 | 0.011 | 0.093 | 0.065 | |
C | r | −0.067 | 0.563* | −0.32 | −0.428 | −0.037 | 0.201 | −0.405 |
Sig. | 0.819 | 0.036 | 0.264 | 0.126 | 0.901 | 0.491 | 0.169 | |
h | r | 0.024 | − 0.541* | −0.106 | 0.649* | −0.47 | −0.298 | 0.752** |
Sig. | 0.935 | 0.046 | 0.719 | 0.012 | 0.09 | 0.3 | 0.003 | |
Si | r | 1 | −0.423 | − 0.621* | − 0.586* | −0.212 | −0.354 | −0.141 |
Sig. | 0.132 | 0.018 | 0.028 | 0.467 | 0.214 | 0.646 | ||
Fe | r | −0.423 | 1 | −0.081 | −0.139 | 0.273 | 0.464 | −0.519 |
Sig. | 0.132 | 0.783 | 0.636 | 0.345 | 0.095 | 0.069 | ||
Ca | r | − 0.621* | −0.081 | 1 | 0.237 | −0.03 | 0.001 | 0.113 |
Sig. | 0.018 | 0.783 | 0.415 | 0.92 | 0.996 | 0.713 | ||
K | r | − 0.586* | −0.139 | 0.237 | 1 | 0.001 | 0.111 | 0.700** |
Sig. | 0.028 | 0.636 | 0.415 | 0.998 | 0.706 | 0.008 | ||
Mn | r | −0.212 | 0.273 | −0.03 | 0.001 | 1 | 0.673** | −0.315 |
Sig. | 0.467 | 0.345 | 0.92 | 0.998 | 0.008 | 0.294 | ||
Cu | r | −0.354 | 0.464 | 0.001 | 0.111 | 0.673** | 1 | −0.054 |
Sig. | 0.214 | 0.095 | 0.996 | 0.706 | 0.008 | 0.86 | ||
Al | r | −0.141 | −0.519 | 0.113 | 0.700** | −0.315 | −0.054 | 1 |
Sig. | 0.646 | 0.069 | 0.713 | 0.008 | 0.294 | 0.86 | ||