Question

The accompanying data are x = advertising share and y = market share for a particular brand of cigarettes during 10 randomly selected years.

x	0.103	0.072	0.072	0.077	0.086	0.047	0.060	0.050	0.070	0.052
y	0.135	0.124	0.122	0.086	0.079	0.076	0.065	0.059	0.051	0.039

(a) Calculate the equation of the estimated regression line. (Round your answers to six decimal places.)
y =

(B) Obtain the predicted market share when the advertising share is 0.09. (Round your answer to five decimal places.)
(____)

(C) Calculate a point estimate of σ. (Round your answer to four decimal places.)

(_____)

Answer 1

The statistical software output for this problem is :

(a)

y = -0.003127 + 1.258741 x

(b)

predicted market share = 0.110159

(c)

A point estimate of σ is 0.026197