2. In order to answer this we need to collect some data Is there a mathematical relationship between a person’s age and the number of sickies they take?
18. The “y-intercept” 19.5 y = mx + b “ y” = Number of sickies (N) “ x” = Age in years (A) N = -0.2233A + 19.5
19. A statistically more accurate way is to find a median regression line This is a more fancy way of finding the line of best fit, eliminating the possibility of getting variations from one person to another, ie. there is only one true line of best fit.
20. Step 1: Divide all the points into three equal groups from left to right
21. Step 2: In each block find the median from left to right