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Ensemble Techniques in Machine Learning

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Ensemble Techniques in Machine Learning Ensemble techniques in machine learning involve combining multiple individual models to create a more powerful and accurate model. The basic idea behind ensemble methods is that by combining the predictions of multiple models, you can often achieve better performance than with a single model. Ensembles are widely used in machine learning because they can improve model robustness, reduce overfitting, and enhance predictive accuracy. There are several popular ensemble techniques, including: Bagging (Bootstrap Aggregating): Bagging involves training multiple instances of the same model on different subsets of the training data, often with replacement. The final prediction is obtained by averaging or taking a majority vote of the predictions from these individual models. Random Forest is a well-known ensemble method that uses bagging with decision trees. Boosting: Boosting methods focus on sequentially tra...

Statistics for Data Science

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Statistics: Statistics is a branch of mathematics that involves collecting, analyzing, interpreting, presenting, and organizing data to make informed decisions and draw conclusions. There are two main types of statistics: Descriptive Statistics: These summarize and describe data without making inferences. Examples include calculating the mean, median, mode and standard deviation of exam scores to understand the class's performance. Inferential Statistics: These use data from a sample to make predictions or inferences about a larger population. It uses techniques like hypothesis testing, confidence intervals, and regression analysis. For instance, polling a random sample of voters to predict the outcome of a general election. Both types are essential for understanding and using data effectively. Key Concepts in Statistics: Population: The entire group of individuals or objects being studied.   Sample: A subse...