Question

Researchers were interested in whether there was a linear relationship between a person's armspan (x) and a person's height (y). The data is shown below

	Armspan	Height
	66	68
	63.5	62
	66	66
	70	71
	66	68
	66	68
	60	64
	61.5	60
Sums:	519	527

a) Find the least squares line between armspan (x) and height (y) based on the data

S_xx = _____

S_xy = _____

b = ______

a = _______

y = ______ + _______x

b) Interpret the meaning of the estimate of the slope B

Height or Armspan increases or decreases by ______ for every unit increase in height or armspan

Answer 1

a)

Sxx =68.3750

Sxy =67.8750

b=0.9927

a =1.4744

y=1.4744+0.9927x

b)

Height increases by 0.9927 for every unit increase in armspan