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Table 6 Results of multiple regression analysis for HP samples: multiple regression coefficient (R), coefficient of determination (R²), adjusted R², p-values

From: Characterization of seventeenth century papers from Valvasor's collection of the Zagreb Archdiocese

	Brightness	Yellowness	Opacity	Gloss
Multiple R	0.78	0.74	0.89	0.63
R²	0.61	0.55	0.80	0.40
Adjusted R²	0.50	0.41	0.74	0.23
p-value	0.037	0.063	0.004	0.169
p-value—thickness	0.299	0.323	0.009	0.582
p-value—pH	0.015	0.025	0.256	0.08

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