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Free Certificate
Logistic Regression for Beginners
Master the fundamentals of Logistic Regression with this free course, covering univariate and multivariate models and their practical applications in data analysis and prediction.
17 hours of learning
Linear Regression
ROC
Data Manipulation
For enquiries call:
18002102020
-7907edd5ed4a4530a3fdd21b035c9db5.webp&w=3840&q=75)
Key Highlights Of This Logistic Regression Course
What You Will Learn
Univariate Logistic Regression
This session provides an introduction to logistic regression using a univariate example. You'll learn about binary classification and key concepts such as the sigmoid function, likelihood function, odds, and log odds, followed by building a logistic regression model in Python.
Topics Covered
- Binary classification
Binary classification is the process of categorizing data into two distinct classes, often represented as 0 and 1. It’s the basis of logistic regression and is used in applications like classifying emails as spam or non-spam, predicting disease presence, or determining credit card fraud. Understanding binary classification helps lay the groundwork for more complex models. - Sigmoid function
The sigmoid function is a mathematical function that converts the linear output of a regression model into probabilities, ranging from 0 to 1. It is essential for logistic regression as it allows us to interpret the result as a probability of belonging to one of the classes. The function helps to model probabilities that are bounded within a specific range, which is perfect for classification tasks. - Likelihood function
The likelihood function measures how probable the observed data is, given a set of model parameters. In logistic regression, we use the likelihood function to estimate parameters (weights) that maximize the probability of correctly predicting the outcomes. By applying Maximum Likelihood Estimation (MLE), we find the optimal model coefficients. - Building a logistic regression model in Python In this segment, you'll get hands-on experience with Python, specifically using libraries like scikit-learn to build a logistic regression model. The process includes data preparation, training the model, and evaluating its performance using various metrics. You'll learn the practical steps needed to implement logistic regression on your own datasets.
- Odds and log odds
In logistic regression, odds represent the ratio of the probability of the event occurring to the probability of it not occurring. Log odds are simply the logarithm of the odds. These concepts help to interpret the coefficients of the logistic regression model and understand how changes in predictor variables affect the likelihood of a certain outcome.
Multivariate LR - Model Building
This session introduces multivariate logistic regression, where multiple predictor variables are used to predict a binary outcome. It’s a more advanced version of univariate logistic regression, similar to linear regression but applied in a classification context.
Topics Covered
- Build a multivariate logistic regression model in Python
Learn how to extend the basic logistic regression model to include multiple predictor variables, providing a more nuanced and accurate prediction. You'll go step-by-step through the process of selecting variables, fitting the model, and evaluating its performance using Python. This allows you to model more complex real-world problems where multiple factors influence the outcome. - Automated methods: RFE
Recursive Feature Elimination (RFE) is a feature selection method that helps identify the most important variables in the dataset. RFE works by recursively removing the least important features, refitting the model, and then ranking the features based on their importance. This technique is crucial for improving model performance and reducing overfitting by focusing on the most significant predictors. - Manual methods: VIF and p-value check
Variance Inflation Factor (VIF) is used to detect multicollinearity in your model. If predictors are highly correlated, they may distort the regression analysis. VIF helps you decide which features to remove to avoid multicollinearity. Additionally, p-value checks help assess the statistical significance of each predictor in the model. Features with high p-values can be removed to improve model accuracy and interpretation.
Multivariate LR - Model Evaluation
This session covers evaluation techniques that go beyond simple accuracy to assess the performance of multivariate logistic regression models. You'll learn important metrics and techniques used to evaluate model effectiveness in real-world applications.
Topics Covered
- Accuracy
Accuracy is the percentage of correct predictions made by the model. While it’s an easy metric to understand, it can be misleading, especially with imbalanced datasets. A model that predicts the majority class well but ignores the minority class might still achieve high accuracy but perform poorly in practice. Therefore, it's crucial to use other metrics alongside accuracy to evaluate model performance. - Sensitivity, Specificity, and the ROC curve
Sensitivity (also known as the true positive rate) measures how well the model detects positive outcomes, while specificity (the true negative rate) evaluates how well the model identifies negative outcomes. The ROC curve (Receiver Operating Characteristic curve) provides a visual representation of the trade-off between sensitivity and specificity. It helps in selecting the best classification threshold for the model. These metrics are particularly useful when dealing with imbalanced classes. - Precision and Recall
Precision and recall are critical in situations where the cost of false positives and false negatives is high. Precision measures the percentage of correct positive predictions, while recall calculates the proportion of actual positives correctly identified by the model. The balance between precision and recall can be managed using the F1-score, which is the harmonic mean of the two. These metrics are especially important in fields like medical diagnostics and fraud detection.
LR - Industry Applications
In this session, we dive into real-world applications of logistic regression in business and industry, exploring how to apply model-building techniques in practical settings like customer segmentation and marketing.
Topics Covered
- Sample selection Learn the importance of choosing an appropriate sample for logistic regression analysis. The sample selection process is crucial for ensuring that the model is representative of the population and that the findings are generalizable. You'll explore how to handle sampling biases and ensure your data is diverse and accurately reflects the real-world problem you're modeling.
- Segmentation Logistic regression is widely used for customer segmentation. By analyzing various demographic and behavioral variables, businesses can predict the likelihood of a customer converting or engaging with a product. This segmentation allows for targeted marketing, personalized recommendations, and improved customer experience. You'll explore how logistic regression helps in identifying customer segments and predicting their actions.
- Variable transformation Transforming variables can improve model performance by making the predictors more suitable for logistic regression. This could involve techniques such as normalizing, encoding categorical variables, or creating interaction terms. The goal is to ensure that the data aligns with the assumptions of logistic regression, which can lead to more accurate and interpretable results. You'll learn practical methods for transforming variables to enhance the predictive power of your models.
Logistic Regression Free Course Certification
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Why Take This Logistic Regression Course? Top Benefits You Can’t Miss
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