Snowpacks contain a wide spectrum of pollutants that may represent environmental hazards...

Snowpacks contain a wide spectrum of pollutants that may represent environmental hazards. The article “Atmospheric PAH Deposition: Deposition Velocities and Washout Ratios” (J. of Environmental Engineering, 2002: 186–195) focused on the deposition of polyaromatic hydrocarbons. The authors proposed a multiple regression model for relating deposition over a specified time period (y, in mg/m2) to two rather complicated predictors x₁ (mg-sec/m³) and x₂ (mg/m²), defined in terms of PAH air concentrations for various species, total time, and total amount of precipitation. Here is data on the species fluoranthene and corresponding Minitab output:

Formulate questions and perform appropriate analyses to draw conclusions.