Table 5 Correlation analysis of element content and color in group 3.
Si | Fe | Ca | K | Mn | Cu | ||
|---|---|---|---|---|---|---|---|
Number of cases | 17 | 17 | 17 | 17 | 17 | 17 | |
L* | r | 0.162 | −0.186 | 0.047 | − 0.576* | − 0.627** | −0.184 |
Sig. | 0.536 | 0.474 | 0.858 | 0.015 | 0.007 | 0.48 | |
C* | r | 0.084 | 0.337 | −0.427 | 0.228 | −0.245 | −0.176 |
Sig. | 0.748 | 0.186 | 0.087 | 0.379 | 0.344 | 0.5 | |
h° | r | 0.630** | 0.208 | − 0.795** | 0.296 | −0.209 | − 0.508* |
Sig. | 0.007 | 0.423 | 0 | 0.248 | 0.421 | 0.037 | |
Si | r | 1 | −0.208 | − 0.666** | −0.232 | −0.195 | − 0.484* |
Sig. | 0.423 | 0.004 | 0.369 | 0.452 | 0.049 | ||
Fe | r | −0.208 | 1 | − 0.485* | 0.575* | 0.155 | 0.015 |
Sig. | 0.423 | 0.048 | 0.016 | 0.551 | 0.954 | ||
Ca | r | − 0.666** | − 0.485* | 1 | −0.408 | −0.104 | 0.459 |
Sig. | 0.004 | 0.048 | 0.104 | 0.69 | 0.064 | ||
K | r | −0.232 | 0.575* | −0.408 | 1 | 0.426 | −0.08 |
Sig. | 0.369 | 0.016 | 0.104 | 0.088 | 0.761 | ||
Mn | r | −0.195 | 0.155 | −0.104 | 0.426 | 1 | 0.301 |
Sig. | 0.452 | 0.551 | 0.69 | 0.088 | 0.24 | ||
Cu | r | − 0.484* | 0.015 | 0.459 | −0.08 | 0.301 | 1 |
Sig. | 0.049 | 0.954 | 0.064 | 0.761 | 0.24 | ||
