A regression model

Explain that about 95% of values from any normal distribution are within ±2σ of the mean. Drag the slider and explain that this implies that 95% of the values from the regression model will be within the grey band.

Click the y-x rotation button then click Take sample several times. Observe that about 95% of crosses are within the band.

This means that :

The model can be summarised by a grey band ±2σ on each side of the regression line