A Toyota dealer wished to predict the sales prices of used Toyota Corollas and gathered 1,436 observations concerning sales prices of

used Corollas and the values of 36 predictor variables. Sixty percent of the observations (actually 862 observations) were randomly

selected as the training data set, and the remaining 40 percent of the observations (574 observations) were used as the validation

data set. A portion of the data, as well as part of a JMP regression tree analysis of the data, are shown in Figures 5.24 and 5.25. The

default minimum split size of 5 was used.

A Toyota dealer wished to predict the sales prices of used Toyota Corollas and gathered 1,436 observations concerning sales prices of used Corollas and the values of 36 predictor variables. Sixty percent of the observations (actually 862 observations) were randomly selected as the training data set, and the remaining 40 percent of the observations (574 observations) were used as the validation data set. A portion of the data, as well as part of a JMP regression tree analysis of the data, are shown in Figures 5.24 and 5.25. The default minimum split size of 5 was used. a. Using the information given in Eigures 5,24 and 5.25, find the prediction of the sales price of used Toyota Corolla 1437, which has just been obtained by the Toyota dealer and has not yet been sold. Prediction of the sales price b-1. Redo the regression trees analysis and part a using a specified minimum split size of 20. Find the prediction of the sales price of used Toyota Corolla 1437, which has just been obtained by the Toyota dealer and has not yet been sold. Prediction of the sales price b-1. Redo the regression trees analysis and part a using a specified minimum split size of 20. Find the prediction of the sales price of used Toyota Corolla 1437, which has just been obtained by the Toyota dealer and has not yet been sold. Prediction of the sales price The prediction using a minimum split size of 20 is the default minimum split size of 5 FIGURE 5.25 The First 10 Leafs and the Last 10 Leafs of the 48-Leaf Corolla Price Regression Tree Leaf Report Leaf Label Mean Age_03_043=338A90_08_04>=578A90_08_04>=69&KM>=145996&ABSC1 5811:25 Ago_08_04>=336.Age_08_04>=57&Ago_08_04>=69&KM>=145996&ABS>=1&FUOL_TypoPotrol) 6200 Ago_08_043=336A90_08_04>=578 Age_08.04>=696KM>=145996&ABS>1&Fuel Typol Diesel) 7050 Ago_08_04338Age_08_04>=57&Age_08_04>=698KM=578Age_08_04>=69&KM=338Age_08_04>=57&Age_08_045=69&KM=1&Doorp=5 8840 Age_08_04=338Age_06_04>=578Age_08_04>=698KM=1 8112.47368 Age_08_04>=338A90_08_04>=578A90_08_04)=69&KM=338A90_08_04>=576Ago_08_043=698M 145996&Quarterly Too 85&Tow_Bar=578Age_08_04=135337&HP=19&Central_Lock=19&Central lock=1&Weight=19&Central locko=1&Weight>=1115 Age_08_04=2003&Quarterly_Tax=1&Mfg.Month=4 Age_08_04 3 3 4 . 4 310 210 210 210 100 5 5 5 5 1165 1165 1165 1345 1185 1108 1245 0 5 210 ABS Airbag_1 Arbag 2 Airco Automatkinto Bordcomputer co_Player Central Lock Powered_Windows 1 2 2 o 1 o 1 1 1 O 0 O 1 1 1 0 10 13 1 1 1 O Power Steering 1 1 1 1 O Radio Mistlampe Sport Model Backseat,Divider Metallk_Rim Radlo_cassette Tow_Bar Valldation O O 0 0 0 Validation o o o O Validation o 0 0 g 0 0 Trang 1 o . 0 Vio Hng 0 O OOOOO 10 1437 AICE RSquare RMSE N Number of Splits 0333 33853912 062 47 0.05 13075365574 Thing Von 143 Validation Price Desidual Price Predicted Leaf Number 1437 Leaf Label AD10423 Weight 1125 Mei 2005 A Toyota dealer wished to predict the sales prices of used Toyota Corollas and gathered 1,436 observations concerning sales prices of used Corollas and the values of 36 predictor variables. Sixty percent of the observations (actually 862 observations) were randomly selected as the training data set, and the remaining 40 percent of the observations (574 observations) were used as the validation data set. A portion of the data, as well as part of a JMP regression tree analysis of the data, are shown in Figures 5.24 and 5.25. The default minimum split size of 5 was used. a. Using the information given in Eigures 5,24 and 5.25, find the prediction of the sales price of used Toyota Corolla 1437, which has just been obtained by the Toyota dealer and has not yet been sold. Prediction of the sales price b-1. Redo the regression trees analysis and part a using a specified minimum split size of 20. Find the prediction of the sales price of used Toyota Corolla 1437, which has just been obtained by the Toyota dealer and has not yet been sold. Prediction of the sales price b-1. Redo the regression trees analysis and part a using a specified minimum split size of 20. Find the prediction of the sales price of used Toyota Corolla 1437, which has just been obtained by the Toyota dealer and has not yet been sold. Prediction of the sales price The prediction using a minimum split size of 20 is the default minimum split size of 5 FIGURE 5.25 The First 10 Leafs and the Last 10 Leafs of the 48-Leaf Corolla Price Regression Tree Leaf Report Leaf Label Mean Age_03_043=338A90_08_04>=578A90_08_04>=69&KM>=145996&ABSC1 5811:25 Ago_08_04>=336.Age_08_04>=57&Ago_08_04>=69&KM>=145996&ABS>=1&FUOL_TypoPotrol) 6200 Ago_08_043=336A90_08_04>=578 Age_08.04>=696KM>=145996&ABS>1&Fuel Typol Diesel) 7050 Ago_08_04338Age_08_04>=57&Age_08_04>=698KM=578Age_08_04>=69&KM=338Age_08_04>=57&Age_08_045=69&KM=1&Doorp=5 8840 Age_08_04=338Age_06_04>=578Age_08_04>=698KM=1 8112.47368 Age_08_04>=338A90_08_04>=578A90_08_04)=69&KM=338A90_08_04>=576Ago_08_043=698M 145996&Quarterly Too 85&Tow_Bar=578Age_08_04=135337&HP=19&Central_Lock=19&Central lock=1&Weight=19&Central locko=1&Weight>=1115 Age_08_04=2003&Quarterly_Tax=1&Mfg.Month=4 Age_08_04 3 3 4 . 4 310 210 210 210 100 5 5 5 5 1165 1165 1165 1345 1185 1108 1245 0 5 210 ABS Airbag_1 Arbag 2 Airco Automatkinto Bordcomputer co_Player Central Lock Powered_Windows 1 2 2 o 1 o 1 1 1 O 0 O 1 1 1 0 10 13 1 1 1 O Power Steering 1 1 1 1 O Radio Mistlampe Sport Model Backseat,Divider Metallk_Rim Radlo_cassette Tow_Bar Valldation O O 0 0 0 Validation o o o O Validation o 0 0 g 0 0 Trang 1 o . 0 Vio Hng 0 O OOOOO 10 1437 AICE RSquare RMSE N Number of Splits 0333 33853912 062 47 0.05 13075365574 Thing Von 143 Validation Price Desidual Price Predicted Leaf Number 1437 Leaf Label AD10423 Weight 1125 Mei 2005