Question

introduction to the prac

Answer 1

(a)

We can see from the above plot that the points are arranged in a linear fashion and hence the straight line adequetly describes the data.

Correct option : Yes

(b)

Regression line :

Stride rate = 1.5376 + 0.0969 Speed

(c)

Residual = Predicted value - Observed value

	Predicted value	Residual
15.88	3.077	-0.013
16.77	3.164	-0.016
17.39	3.224	0.014
18.55	3.336	0.006
19.71	3.449	0.029
21.02	3.576	0.016
21.94	3.665	-0.035
		0.00	Total

Here, we can see that the residuals add to zero.