Statistical Modelling(Edexcel International A Level Maths: Statistics 1)

Author

Dan

Expertise

Maths

Statistical Modelling

What is a statistical model?

• A statistical model allows you to use mathematics to model real-life situations
• You could model the temperature throughout of a city throughout a month
• You could model the sleeping times of a baby
• There are advantages to using a statistical model
• It simplifies the complicated real-life situation
• It can be made quickly and easily
• It can be used to make predictions for real-life
• There are also things to consider when using a statistical model
• It does not consider all the real-life features from the situation
• It might only be applicable for specific scenarios
• It might not provide accurate predictions for the future

What are the stages of a statistical model?

• Stage 1
A real-life problem is identified
• Stage 2
An initial statistical model is designed
• Stage 3
The model is used to make predictions
• Stage 4
Real-life data is collected
• Stage 5
Comparisons are made between the expected values from the model and the observed values from the data
• Stage 6
Consideration of the data selection and collection processes alongside statistical tests are used to assess the validity of the model
• Stage 7
The model is adjusted and improved (if necessary) based on the results

Exam Tip

• Questions on statistical modelling are rare but it is worth remembering the steps. Easy marks if it comes up.

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Author:Dan

Dan graduated from the University of Oxford with a First class degree in mathematics. As well as teaching maths for over 8 years, Dan has marked a range of exams for Edexcel, tutored students and taught A Level Accounting. Dan has a keen interest in statistics and probability and their real-life applications.