Assessing model performance

To test which approach is best—the whole dataset model or the models for each house age category—you need to calculate some metrics. Here's, you'll compare the coefficient of determination and the residual standard error for each model.

Four models of price versus no. of convenience stores (mdl_all_ages, mdl_0_to_15, mdl_15_to_30, and mdl_30_to_45) are available; dplyr and broom are loaded.

แบบฝึกหัดนี้เป็นส่วนหนึ่งของหลักสูตร

Intermediate Regression in R

ดูคอร์ส

แบบฝึกหัดเชิงโต้ตอบแบบลงมือทำ

ลองทำแบบฝึกหัดนี้โดยเติมโค้ดตัวอย่างนี้ให้สมบูรณ์

# Get the coeff. of determination for mdl_all_ages
___



# Get the coeff. of determination for mdl_0_to_15
___



# Get the coeff. of determination for mdl_15_to_30
___



# Get the coeff. of determination for mdl_30_to_45
___

แก้ไขและรันโค้ด