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Salary Prediction with Linear Regression

DEV Community •
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A DEV Community project demonstrates how to predict employee salaries using linear regression. The analysis relies on Python libraries like pandas and scikit-learn to model the relationship between years of experience and pay. By defining experience as the independent variable and salary as the dependent variable, the project builds a statistical framework for forecasting compensation based on a simple dataset.

Data preparation involves splitting the dataset into training and testing sets. The model uses F-regression to validate the relationship, yielding a high F-value and a 0.0 p-value. This confirms a statistically significant link between tenure and earnings. The process follows standard machine learning workflows, separating data to prevent overfitting and ensure the model generalizes well to new information.

Training the model calculates the intercept and coefficient, translating the algorithm into the formula Y = b0 + b1X. The project reports an R-squared score of 0.93, indicating the model explains 93% of salary variations. This high accuracy suggests that while experience is the primary driver, other factors likely influence pay in real-world scenarios.

This exercise highlights the accessibility of predictive analytics for HR and business planning. While the dataset is small, the methodology offers a blueprint for estimating compensation trends or identifying salary anomalies. Future iterations could incorporate variables like education or location to refine predictions further.