# Basics of Predictive modelling for Beginners

**Predictive modelling** is a crucial field in data science that has transformed the way organisations approach decision-making. Predictive modelling involves the use of statistical and machine learning techniques to make predictions about future outcomes. This article will provide a beginner’s guide to predictive modelling, including its basics, applications, and steps involved in building predictive models.

**Basics of Predictive Modelling**

Predictive modelling involves the use of statistical and machine learning techniques to develop a model that predicts future outcomes. The model is created using historical data that is representative of the future data the model is expected to predict. The historical data is divided into two parts: training data and testing data. The training data is used to build the model, while the testing data is used to evaluate the performance of the model.

**Applications of Predictive Modelling**

Predictive modelling has numerous applications across various industries. Here are some of the fields in which predictive modelling has been successfully applied:

**Finance**

Predictive modelling is used in finance to forecast trends and make predictions about future market behavior. For example, financial institutions use predictive models to make decisions about investments, loan approvals, and credit risk assessment.

**Marketing**

Predictive modelling is used in marketing to identify potential customers and to develop marketing campaigns that are tailored to specific customer segments. Predictive models are used to predict customer behaviour and preferences, which is used to improve customer experience and increase customer loyalty.

**Healthcare**

Predictive modelling is used in healthcare to develop models that predict patient outcomes and to make decisions about treatment plans. For example, predictive models are used to predict patient readmission rates and to identify patients who are at risk of developing certain diseases.

**Steps Involved in Building Predictive Models**

Building a predictive model involves several steps, including the following:

- Problem Definition : The first step in building a predictive model is to define the problem you are trying to solve. This involves identifying the objective of the model and the data required to achieve that objective.

- Data Collection and Preparation : The second step in building a predictive model is to collect and prepare the data that will be used to build the model. This involves cleaning and transforming the data to ensure that it is in a format that can be used to build the model.

- Exploratory Data Analysis : The third step in building a predictive model is to perform exploratory data analysis. This involves visualising and analysing the data to identify patterns and relationships that can be used to build the model.

- Model Selection : The fourth step in building a predictive model is to select the appropriate model to use. This involves choosing the machine learning algorithm that is best suited to the problem you are trying to solve.

- Model Training : The fifth step in building a predictive model is to train the model using the training data. This involves using the historical data to create a model that can predict future outcomes.

- Model Evaluation : The sixth step in building a predictive model is to evaluate the performance of the model using the testing data. This involves measuring the accuracy of the model and identifying areas where the model can be improved.

- Model Deployment : The final step in building a predictive model is to deploy the model. This involves integrating the model into the business process and using it to make predictions in real-time.

**Conclusion**

Predictive modelling is a powerful tool that can be used to make accurate predictions about future outcomes. It has numerous applications in various industries, including finance, marketing, and healthcare. Building a predictive model involves several steps, including problem definition, data collection and preparation, exploratory data analysis, model selection, model training, model evaluation, and model deployment. With a basic understanding of the fundamentals of predictive modelling, beginners can start exploring the potential of predictive modelling in their field of interest.

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