How Microsoft Power BI Data Analysts Clean and Prepare Data
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Business Description
Step 1: Data PreparationThe first step in any predictive analytics process is data preparation. This involves cleaning, transforming, and structuring data to ensure it is suitable for modeling.
Data Cleaning – Ensure data is free of errors, missing values, or inconsistencies that could affect the model accuracy.
Feature Engineering – Create additional relevant variables or features that might improve the predictive accuracy of the model.
Data Transformation – Transform data types, aggregate data, and normalize it as needed to ensure consistency across datasets.
Power BI provides Power Query, a tool for cleaning and transforming data. Data Analysts can use Power Query to handle data preparation, such as filtering rows, pivoting columns, merging datasets, and removing duplicates.
Step 2: Selecting the Right Model
Choosing the correct model depends on the type of prediction you want to make. The most commonly used predictive models in Power BI include:
Regression Analysis – Useful for forecasting continuous variables like sales, revenue, or costs.
Classification Models – Best for categorical predictions, such as identifying customer segments or predicting churn.
Time Series Forecasting – Ideal for analyzing trends over time and predicting future values based on historical data patterns.
Clustering Models – These group similar data points together, helpful in customer segmentation or product categorization.
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