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Mathematics A-Level Edexcel Statistics and Mechanics (Year 2 Statistics) > Regression, correlation and Hypothesis Testing > Flashcards

Flashcards in Regression, correlation and Hypothesis Testing Deck (1)
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Q

Exponential Models 1: (Fundamentals)

What are the 2 equations for exponential models and explain which is which?

A

For data that can be modelled by a linear relationship by a relationship of the form y=ax^n, you need t code the data using Y=log(y) and X=log(x) to obtain a linear relationship.
- If y=ax^n for constants a and n then log(y)=log(a)+nlog(x)
For data that can be modelled by an exponential relationship of the form y=ab^x, you need to code the data using Y=log(y) and X=x to obtain a linear relationship.
- If y=kb^x for constants k and b then log(y)=log(k)+xlog(b)