Variable KH2PO4 MgSO4 .7H2O Glucose Peptone Yeast Extract Sucrose Molasses
∑(H) 208.4 201.3 158.8 205.0 160.9 193.3 190.5
∑(L) 163.8 170.9 213.4 167.2 211.3 178.9 181.7
∑(H) - ∑(L) 44.61 30.4 -54.6 37.8 -50.4 14.4 8.8
Effect 11.15 7.6 -13.65 9.45 -12.6 3.6 2.2
Mean Square 248.75 115.52 372.64 178.60 317.52 25.92 9.68
F-test 0.78 0.36 1.17 0.5625 1.0 0.081 0.03
Table 2: F-test for Plackett-Burman design.