12. Four research participants take a test of manual dexterity (high scores mean better dexterity) and an anxiety test (high scores mean more anxiety). The scores are as follows.

Question

Person Dexterity Anxiety
1 1 10
2 1 8
3 2 4
4 4 –2

(a) Scatter Graph:
Scatter and Regression

Answer 1

Using an online calculator, we have 4 data pairs (x,y):
(1,10)
(1,8)
(2,4)
(4,-2)

Regression equation:
y = a + bx
y = 12.3 - 3.67x

This is the line of best fit. You can plot the scatter graph using the points above (x,y) to see how close the points are to the regression line.

I hope this helps and is what you were asking.