Question

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

x	0.101	0.072	0.071	0.077	0.086	0.047	0.060	0.050	0.070	0.052
y	0.136	0.125	0.123	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=________

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

__________

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

_________

Answer 1

The statistical software output for this problem is:

From above output:

a) y = -0.004329 + 1.286131 x

Predicted value = 0.11142

b) Point estimate = 0.0269