Chi Squared Tests for Standard Distributions (Edexcel A-Level Further Mathematics): Flashcards

Line of best fit for linearly correlated data

Squares of vertical distances from points to line

y depends on x

The dependent (y) variable

b = rac{S_{xy}}{S_{xx}}

$y = a + bx$ where a = ar{y} - bar{x}

Predicting outside data range (unreliable)

Linearly correlated data & predict inside range

Should be assigned as x

Change in y per 1 unit increase in x