How Can You Check If Regression Assumptions Are Met? - The Friendly Statistician

Описание: How Can You Check If Regression Assumptions Are Met? Are you interested in understanding how to verify if your regression analysis is reliable? In this detailed video, we'll walk you through the key steps to check if your regression assumptions are met. We’ll explain how to assess the relationship between variables using residual plots and what patterns to look for that might indicate issues with your model. You’ll learn how to test for independence of residuals, especially in time-series data, using the Durbin-Watson test, and why this is important for accurate results. We’ll also cover how to evaluate the consistency of residual spread across different levels of predictors, known as homoscedasticity, by examining residuals versus fitted values plots. Additionally, we’ll show you how to check if residuals follow a normal distribution, which is essential for valid hypothesis testing, through normal Q-Q plots and simple tests like the Shapiro-Wilk. The video also discusses how to identify multicollinearity among multiple predictors using the Variance Inflation Factor, and why high correlation can impact your interpretation. Finally, we’ll demonstrate how to detect outliers and influential points that could distort your analysis using residuals versus leverage plots and Cook’s distance. Using these diagnostic tools in your statistical software ensures your regression results are based on solid assumptions. Join us to improve your data analysis skills and make more trustworthy conclusions from your data. Subscribe for more data analysis tips and tutorials!

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