oataset: india_coal.csv Source: S.K. Ray, D.C. Panigrahi, A.K. Varma (2014). "An Electro-Chemical Method for Determining the Susceptibility of Indian Coals to Spontaneous Heating," International Journal of Coal Geology, Vols. 128-129, pp. 68-80 Deescription: Proximate, Ultimate, Petrographic Variables, and Wet Oxidation Potential Analysis Results for 78 Coal Samples. **Proximate Variables (in wt. %) (labels): Moisture (moisture) Ash yield (ash.yld) Fixed Carbon (fxd.crbn) Volatile Matter Yield (vm.yld) **Ultimate Variables (dry ash free basis, in wt. %): Carbon (carbon) Hydrogen (hydrogen) Nitrogen (nitrogen) Sulfur (sulfur) Oxygen (oxygen) **Petrographic Variables (mineral matter free basis, in vol. %): Vitrinite (vitrinite) Intertinite (intertinite) Liptinite (liptinite) ** Other Variable: Crossing Point Temperature ** Susceptibility Index Variables ** Wet Oxidation Potential Difference (Pre-Coal - Post-Coal) ** 12 Conditions Based on Levels of KMnO4, KOH, and Temperature (C): PD1:KMn04=0.05, KOH=1, Temp=27 (pd1) PD2:KMn04=0.05, KOH=1, Temp=40 (pd2) PD3:KMn04=0.05, KOH=1, Temp=45 (pd3) PD4:KMn04=0.1, KOH=1, Temp=27 (pd4) PD5:KMn04=0.1, KOH=1, Temp=40 (pd5) PD6:KMn04=0.1, KOH=1, Temp=45 (pd6) PD7:KMn04=0.15, KOH=1, Temp=27 (pd7) PD8:KMn04=0.15, KOH=1, Temp=40 (pd8) PD9:KMn04=0.15, KOH=1, Temp=45 (pd9) PD10:KMn04=0.2, KOH=1, Temp=27 (pd10) PD11:KMn04=0.2, KOH=1, Temp=40 (pd11) PD12:KMn04=0.2, KOH=1, Temp=45 (pd12) ** Analyses: 1) Principal Components with the following vars: moisture,ash.yld,vm.yld,fxd.crbn,carbon,hydrogen,oxygen,vitrinite, intertinite,litinite,pd** (one-at-a-time for the pd's) 2) Multiple Regression Models (One-at-a-time with Y=pd**) and predictors: moisture,vm.yld,carbon,hydrogen,oxygen