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 0.073 0.071 0.077 0.086 0.047 0.060 0.050 0.070 0.052 y 0.135 0.126 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. (Give the answers to six decimal places.) y =__________ Obtain the predicted market share when the advertising share is .09. (Round your answer to five decimal places.) ________ (b) Compute r^2. (Give the answer to three decimal places.) __________ (c) Calculate a point estimate of ?. (Give the answer to four decimal places.) (the symbol after the words \"estimate of\" is alpha symbol) _____________ On how many degrees of freedom is your estimate based? ___________ Solution Use excel:data analysis and chose regressionthen chose your x and y valueschose labelsselect where you want the chart to go.

1. 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 0.073 0.071 0.077 0.086 0.047 0.060 0.050 0.070 0.052
y 0.135 0.126 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. (Give the answers to six decimal
places.)
y =__________
Obtain the predicted market share when the advertising share is .09. (Round your answer to five
decimal places.) ________
(b) Compute r^2. (Give the answer to three decimal places.)
__________
(c) Calculate a point estimate of ?. (Give the answer to four decimal places.) (the symbol after
the words "estimate of" is alpha symbol)
_____________
On how many degrees of freedom is your estimate based?
___________
Solution
Use excel:data analysis and chose regressionthen chose your x and y valueschose labelsselect
where you want the chart to go