IB Maths AA 4.4 Definitions
This page contains our IB Maths AA definitions for 4.4. By learning each one of these definitions, you will fully cover the content for IB Maths AA 'Linear statistics'.
bivariate
Involving two numerical variables measured together as paired values, usually written as .
correlation
A description of the direction and strength of the relationship between two variables, as seen in a scatter diagram.
extrapolation
Using a regression line to predict a value that lies outside the range of the observed data, which is generally less reliable.
gradient
The coefficient in , giving the predicted change in when increases by .
interpolation
Estimating a value at an unknown point using known values at nearby points; in nearest neighbour interpolation, the estimate is taken from the closest site.
negative correlation
Describing correlation where points tend to fall from left to right as increases.
Pearson's
Referring to the product-moment correlation coefficient , a statistic that measures the strength and direction of a linear relationship and lies between and .
positive correlation
Describing a correlation where the points in a scatter diagram tend to rise from left to right.
regression
A method for modelling a linear relationship with a line used to make predictions from bivariate data.
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