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Table 1 Plackett-Burman experiment analysis results of single-factor experiments

From: A systematic study of the production of Monacolin K by solid state fermentation of Monascus ruber

Source Sum of squares Degree of freedom Mean squares F-value Prob > F
Model 67.66 7 9.67 15.75 0.0091**
X1 23.49 1 23.49 38.27 0.0035**
X2 7.76 1 7.76 12.64 0.0237*
X3 0.45 1 0.45 0.74 0.4390
X4 19.33 1 19.33 31.49 0.0050**
X5 1.53 1 1.53 2.5 0.1891
X6 13.00 1 13.00 21.18 0.0100**
X7 2.09 1 2.09 3.14 0.1381