The model that we developed to show housing prices of Ames, Iowa inluded the variables that were integers. The main variables that we included were neighborhood, half bathroom, lot area, and living area. This model is able to judge the variables that go into determining the price a house will be sold at.
##
## Call:
## lm(formula = SalePrice ~ PID + log(Lot.Area) + Street + Lot.Shape +
## Land.Contour + Lot.Config + Land.Slope + Neighborhood + Condition.1 +
## Bldg.Type + House.Style + Overall.Qual + Year.Built + Year.Remod.Add +
## Roof.Style + Foundation + Heating + Heating.QC + Central.Air +
## X1st.Flr.SF + X2nd.Flr.SF + Low.Qual.Fin.SF + log(Gr.Liv.Area) +
## Full.Bath + Half.Bath + Bedroom.AbvGr + Kitchen.AbvGr + Kitchen.Qual +
## log(TotRms.AbvGrd) + Functional + Fireplaces + Wood.Deck.SF +
## Open.Porch.SF + X3Ssn.Porch + Screen.Porch + Pool.Area +
## Mo.Sold + Yr.Sold + Sale.Type + Sale.Condition, data = Train)
##
## Residuals:
## Min 1Q Median 3Q Max
## -352858 -13085 -548 11846 233676
##
## Coefficients:
## Estimate Std. Error t value Pr(>|t|)
## (Intercept) 2.282e+05 9.832e+05 0.232 0.816511
## PID 3.972e-06 9.499e-06 0.418 0.675850
## log(Lot.Area) 1.442e+04 2.441e+03 5.910 3.99e-09 ***
## StreetPave 1.656e+04 9.947e+03 1.665 0.096074 .
## Lot.ShapeIR2 5.652e+03 4.371e+03 1.293 0.196172
## Lot.ShapeIR3 -3.519e+04 9.590e+03 -3.669 0.000249 ***
## Lot.ShapeReg 1.091e+03 1.567e+03 0.696 0.486589
## Land.ContourHLS 2.731e+04 4.835e+03 5.650 1.83e-08 ***
## Land.ContourLow 1.766e+04 6.241e+03 2.829 0.004710 **
## Land.ContourLvl 1.656e+04 3.456e+03 4.790 1.79e-06 ***
## Lot.ConfigCulDSac 6.762e+03 3.101e+03 2.181 0.029312 *
## Lot.ConfigFR2 -5.352e+03 4.187e+03 -1.278 0.201283
## Lot.ConfigFR3 6.291e+03 1.035e+04 0.608 0.543377
## Lot.ConfigInside -4.212e+01 1.694e+03 -0.025 0.980171
## Land.SlopeMod 1.443e+04 3.706e+03 3.893 0.000102 ***
## Land.SlopeSev 7.366e+03 1.049e+04 0.702 0.482796
## NeighborhoodBlueste 2.054e+04 1.344e+04 1.529 0.126485
## NeighborhoodBrDale 1.673e+04 9.499e+03 1.761 0.078421 .
## NeighborhoodBrkSide -4.680e+03 8.628e+03 -0.542 0.587560
## NeighborhoodClearCr -8.246e+03 9.561e+03 -0.862 0.388582
## NeighborhoodCollgCr -9.219e+03 7.982e+03 -1.155 0.248254
## NeighborhoodCrawfor 8.249e+03 8.692e+03 0.949 0.342700
## NeighborhoodEdwards -2.044e+04 8.289e+03 -2.466 0.013760 *
## NeighborhoodGilbert -1.971e+04 7.497e+03 -2.629 0.008627 **
## NeighborhoodGreens 1.587e+04 1.471e+04 1.078 0.281027
## NeighborhoodGrnHill 1.246e+05 2.936e+04 4.244 2.30e-05 ***
## NeighborhoodIDOTRR -1.405e+04 9.100e+03 -1.544 0.122801
## NeighborhoodLandmrk 6.120e+03 2.969e+04 0.206 0.836705
## NeighborhoodMeadowV 1.130e+04 9.655e+03 1.171 0.241771
## NeighborhoodMitchel -1.485e+04 8.554e+03 -1.736 0.082692 .
## NeighborhoodNAmes -9.092e+03 7.383e+03 -1.232 0.218252
## NeighborhoodNoRidge 4.212e+04 8.007e+03 5.260 1.59e-07 ***
## NeighborhoodNPkVill 1.593e+04 9.547e+03 1.668 0.095436 .
## NeighborhoodNridgHt 3.563e+04 7.195e+03 4.952 7.95e-07 ***
## NeighborhoodNWAmes -1.624e+04 7.643e+03 -2.125 0.033719 *
## NeighborhoodOldTown -1.341e+04 8.388e+03 -1.598 0.110182
## NeighborhoodSawyer -8.081e+03 8.230e+03 -0.982 0.326275
## NeighborhoodSawyerW -1.439e+04 7.564e+03 -1.903 0.057201 .
## NeighborhoodSomerst 1.201e+04 7.049e+03 1.703 0.088638 .
## NeighborhoodStoneBr 3.874e+04 8.146e+03 4.756 2.12e-06 ***
## NeighborhoodSWISU -8.995e+03 9.534e+03 -0.943 0.345545
## NeighborhoodTimber 6.908e+02 8.846e+03 0.078 0.937768
## NeighborhoodVeenker 1.250e+04 1.049e+04 1.192 0.233522
## Condition.1Feedr -1.698e+03 4.680e+03 -0.363 0.716775
## Condition.1Norm 8.621e+03 3.851e+03 2.239 0.025269 *
## Condition.1PosA 2.825e+04 8.257e+03 3.421 0.000635 ***
## Condition.1PosN 1.461e+04 6.585e+03 2.219 0.026619 *
## Condition.1RRAe -3.858e+03 7.800e+03 -0.495 0.620944
## Condition.1RRAn 1.017e+04 6.140e+03 1.657 0.097734 .
## Condition.1RRNe -3.567e+03 1.266e+04 -0.282 0.778062
## Condition.1RRNn -5.726e+03 1.094e+04 -0.523 0.600819
## Bldg.Type2fmCon 1.015e+02 5.361e+03 0.019 0.984895
## Bldg.TypeDuplex 6.226e+02 6.312e+03 0.099 0.921437
## Bldg.TypeTwnhs -2.666e+04 5.492e+03 -4.854 1.30e-06 ***
## Bldg.TypeTwnhsE -2.279e+04 3.516e+03 -6.480 1.14e-10 ***
## House.Style1.5Unf 8.829e+03 7.953e+03 1.110 0.267066
## House.Style1Story 1.164e+04 3.636e+03 3.201 0.001391 **
## House.Style2.5Fin -1.448e+04 1.451e+04 -0.998 0.318410
## House.Style2.5Unf -7.343e+03 7.663e+03 -0.958 0.338037
## House.Style2Story -6.144e+03 3.006e+03 -2.044 0.041085 *
## House.StyleSFoyer 2.098e+04 5.333e+03 3.933 8.66e-05 ***
## House.StyleSLvl 1.886e+03 4.071e+03 0.463 0.643197
## Overall.Qual 1.185e+04 8.858e+02 13.379 < 2e-16 ***
## Year.Built 2.750e+02 5.610e+01 4.902 1.02e-06 ***
## Year.Remod.Add 1.849e+02 4.679e+01 3.952 8.00e-05 ***
## Roof.StyleGable 1.489e+04 8.196e+03 1.816 0.069463 .
## Roof.StyleGambrel 1.836e+04 1.064e+04 1.725 0.084615 .
## Roof.StyleHip 2.014e+04 8.270e+03 2.435 0.014970 *
## Roof.StyleMansard 6.785e+03 1.316e+04 0.516 0.606094
## Roof.StyleShed 3.446e+02 1.550e+04 0.022 0.982265
## FoundationCBlock -1.006e+03 2.839e+03 -0.355 0.722951
## FoundationPConc 1.594e+03 3.152e+03 0.506 0.613155
## FoundationSlab -1.622e+04 6.054e+03 -2.679 0.007439 **
## FoundationStone 1.272e+04 1.047e+04 1.215 0.224393
## FoundationWood -9.718e+03 1.486e+04 -0.654 0.513235
## HeatingGasA -4.047e+03 2.895e+04 -0.140 0.888836
## HeatingGasW 4.147e+03 2.957e+04 0.140 0.888491
## HeatingGrav -1.475e+04 3.107e+04 -0.475 0.635093
## HeatingOthW -5.044e+04 3.578e+04 -1.410 0.158780
## HeatingWall 2.304e+04 3.574e+04 0.645 0.519208
## Heating.QCFa -5.084e+03 4.028e+03 -1.262 0.206955
## Heating.QCGd -2.885e+03 1.941e+03 -1.486 0.137321
## Heating.QCPo -3.766e+03 2.118e+04 -0.178 0.858886
## Heating.QCTA -3.971e+03 1.866e+03 -2.128 0.033483 *
## Central.AirY 2.888e+03 3.221e+03 0.897 0.370057
## X1st.Flr.SF 6.091e+01 6.754e+00 9.018 < 2e-16 ***
## X2nd.Flr.SF 6.221e+01 6.387e+00 9.740 < 2e-16 ***
## Low.Qual.Fin.SF 4.286e+01 1.622e+01 2.642 0.008304 **
## log(Gr.Liv.Area) -9.642e+02 1.041e+04 -0.093 0.926193
## Full.Bath 5.764e+03 1.984e+03 2.905 0.003714 **
## Half.Bath 1.721e+03 1.886e+03 0.912 0.361640
## Bedroom.AbvGr -6.242e+03 1.265e+03 -4.936 8.62e-07 ***
## Kitchen.AbvGr -1.757e+04 5.801e+03 -3.029 0.002486 **
## Kitchen.QualFa -4.747e+04 5.544e+03 -8.563 < 2e-16 ***
## Kitchen.QualGd -4.413e+04 3.072e+03 -14.364 < 2e-16 ***
## Kitchen.QualPo -2.153e+04 3.033e+04 -0.710 0.477897
## Kitchen.QualTA -4.652e+04 3.500e+03 -13.291 < 2e-16 ***
## log(TotRms.AbvGrd) 7.022e+02 5.563e+03 0.126 0.899574
## FunctionalMaj2 -8.509e+03 1.292e+04 -0.659 0.510279
## FunctionalMin1 1.883e+04 8.810e+03 2.138 0.032672 *
## FunctionalMin2 1.765e+04 8.815e+03 2.002 0.045420 *
## FunctionalMod 6.988e+03 9.986e+03 0.700 0.484110
## FunctionalSal -3.398e+04 4.181e+04 -0.813 0.416505
## FunctionalSev -2.313e+04 2.227e+04 -1.038 0.299230
## FunctionalTyp 2.823e+04 7.813e+03 3.613 0.000309 ***
## Fireplaces 5.988e+03 1.247e+03 4.803 1.67e-06 ***
## Wood.Deck.SF 2.074e+01 5.360e+00 3.870 0.000112 ***
## Open.Porch.SF -1.092e+01 1.035e+01 -1.055 0.291509
## X3Ssn.Porch 2.000e+01 2.534e+01 0.789 0.429992
## Screen.Porch 5.009e+01 1.137e+01 4.405 1.11e-05 ***
## Pool.Area -5.537e+00 2.049e+01 -0.270 0.786955
## Mo.Sold -1.729e+02 2.358e+02 -0.733 0.463644
## Yr.Sold -6.374e+02 4.877e+02 -1.307 0.191355
## Sale.TypeCon 3.371e+04 1.721e+04 1.959 0.050256 .
## Sale.TypeConLD 1.133e+04 7.853e+03 1.443 0.149186
## Sale.TypeConLI 8.336e+03 1.228e+04 0.679 0.497160
## Sale.TypeConLw 1.174e+04 1.174e+04 1.000 0.317661
## Sale.TypeCWD 1.570e+03 1.036e+04 0.151 0.879637
## Sale.TypeNew 3.793e+04 1.547e+04 2.452 0.014285 *
## Sale.TypeOth 2.893e+04 1.327e+04 2.180 0.029362 *
## Sale.TypeVWD -1.124e+03 2.891e+04 -0.039 0.968992
## Sale.TypeWD 6.168e+03 3.941e+03 1.565 0.117764
## Sale.ConditionAdjLand 1.485e+04 1.043e+04 1.424 0.154473
## Sale.ConditionAlloca 1.887e+04 7.994e+03 2.361 0.018319 *
## Sale.ConditionFamily 5.471e+02 5.734e+03 0.095 0.923985
## Sale.ConditionNormal 8.543e+03 2.785e+03 3.068 0.002183 **
## Sale.ConditionPartial -1.729e+04 1.502e+04 -1.151 0.249869
## ---
## Signif. codes: 0 '***' 0.001 '**' 0.01 '*' 0.05 '.' 0.1 ' ' 1
##
## Residual standard error: 28180 on 2071 degrees of freedom
## Multiple R-squared: 0.8818, Adjusted R-squared: 0.8746
## F-statistic: 122.7 on 126 and 2071 DF, p-value: < 2.2e-16## [1] -258.1261## [1] 191514.2## [1] -303730## [1] 19875.55## [1] 30640.4