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Table 2 Statistical analysis of factors

From: Pretreatment of rice straw with combined process using dilute sulfuric acid and aqueous ammonia

Source DF Mean square F value Pr > F
X 1 1 460.91 22.07 0.0008
X 2 1 2855.64 136.74 <.0001
X 3 1 169.05 8.06 0.0176
X 11 1 124.56 10.82 0.0082
X 22 1 1130.13 56.67 <.0001
X 33 1 90.10 4.32 0.0644
X 12 1 11.23 0.55 0.4761
X 13 1 22.11 1.04 0.3309
X 23 1 2241.12 11.50 0.0069
  1. X1: Temperature.
  2. X2: Concentration of aqueous ammonia.
  3. X3: Reaction time.