Leverage

Leverage mengukur seberapa tidak biasa atau ekstrem variabel penjelas untuk setiap observasi. Secara garis besar, leverage yang tinggi berarti variabel penjelas memiliki nilai yang berbeda dari titik-titik lain dalam himpunan data. Dalam regresi linear sederhana, ketika hanya ada satu variabel penjelas, ini biasanya berarti nilai yang sangat tinggi atau sangat rendah pada variabel penjelas.

Di sini, Anda akan melihat nilai dengan leverage tinggi dalam model harga rumah versus akar kuadrat jarak ke stasiun MRT terdekat pada himpunan data real estat Taiwan.

Tebak observasi mana yang menurut Anda akan memiliki leverage tinggi, lalu gerakkan penggeser untuk mengetahuinya.

Pernyataan mana yang benar?

Latihan ini adalah bagian dari kursus

Pengantar Regresi di R

Latihan interaktif praktis

Ubah teori menjadi tindakan dengan salah satu latihan interaktif kami.

Mulai berolahraga

Latihan ini adalah bagian dari kursus

Pengantar Regresi di R

SkillTag.level.intermediateSkillTag.label

4.8+

Mulai Kursus Gratis

You’ll learn the basics of this popular statistical model, what regression is, and how linear and logistic regressions differ. You’ll then learn how to fit simple linear regression models with numeric and categorical explanatory variables, and how to describe the relationship between the response and explanatory variables using model coefficients.

Exercise 1: A tale of two variables Exercise 2: Which one is the response variable?Exercise 3: Visualizing two variables Exercise 4: Fitting a linear regression Exercise 5: Estimate the intercept Exercise 6: Estimate the slope Exercise 7: Linear regression with lm()Exercise 8: Categorical explanatory variables Exercise 9: Visualizing numeric vs. categorical Exercise 10: Calculating means by category Exercise 11: lm() with a categorical explanatory variable

In this chapter, you’ll discover how to use linear regression models to make predictions on Taiwanese house prices and Facebook advert clicks. You’ll also grow your regression skills as you get hands-on with model objects, understand the concept of "regression to the mean", and learn how to transform variables in a dataset.

Exercise 1: Making predictions Exercise 2: Predicting house prices Exercise 3: Visualizing predictions Exercise 4: The limits of prediction Exercise 5: Working with model objects Exercise 6: Extracting model elements Exercise 7: Manually predicting house prices Exercise 8: Using broom Exercise 9: Regression to the mean Exercise 10: Home run!Exercise 11: Plotting consecutive portfolio returns Exercise 12: Modeling consecutive returns Exercise 13: Transforming variables Exercise 14: Transforming the explanatory variable Exercise 15: Transforming the response variable too

In this chapter, you’ll learn how to ask questions of your model to assess fit. You’ll learn how to quantify how well a linear regression model fits, diagnose model problems using visualizations, and understand the leverage and influence of each observation used to create the model.

Exercise 1: Mengkuantifikasi kecocokan model Exercise 2: Koefisien determinasi Exercise 3: Residual standard error Exercise 4: Memvisualisasikan kecocokan model Exercise 5: Residual versus nilai taksiran Exercise 6: Plot Q-Q dari residual Exercise 7: Scale-location Exercise 8: Membuat plot diagnostik Exercise 9: Pencilan, leverage, dan pengaruh Exercise 10: Leverage

Latihan Saat Ini

Exercise 11: Pengaruh (Influence)Exercise 12: Mengekstrak leverage dan pengaruh

Learn to fit logistic regression models. Using real-world data, you’ll predict the likelihood of a customer closing their bank account as probabilities of success and odds ratios, and quantify model performance using confusion matrices.

Exercise 1: Why you need logistic regression Exercise 2: Exploring the explanatory variables Exercise 3: Visualizing linear and logistic models Exercise 4: Logistic regression with glm()Exercise 5: Predictions and odds ratios Exercise 6: Probabilities Exercise 7: Most likely outcome Exercise 8: Odds ratio Exercise 9: Log odds ratio Exercise 10: Quantifying logistic regression fit Exercise 11: Calculating the confusion matrix Exercise 12: Measuring logistic model performance Exercise 13: Accuracy, sensitivity, specificity Exercise 14: Congratulations