The accompanying data are x = advertising share and y = market share for a parti

Question

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

(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) Compute r2. (Round your answer to three decimal places.)


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


On how many degrees of freedom is your estimate based?

x 0.102 0.072 0.072 0.077 0.086 0.047 0.060 0.050 0.070 0.052 y 0.134 0.126 0.121 0.086 0.079 0.076 0.065 0.059 0.051 0.039

Explanation / Answer

a) y = -0.00309 + 1.259979*x b) R^2 0.432 c) s = 0.0264 d) df= (n-1) = 9 SUMMARY OUTPUT Regression Statistics Multiple R 0.657538 R Square 0.432356 Adjusted R Square 0.361401 Standard Error 0.026403 Observations 10 ANOVA df SS MS F Significance F Regression 1 0.004248 0.004248 6.093348 0.038803 Residual 8 0.005577 0.000697 Total 9 0.009824 Coefficients Standard Error t Stat P-value Lower 95% Upper 95% Lower 95.0% Upper 95.0% Intercept -0.00309 0.036096 -0.08551 0.933958 -0.08632 0.080152 -0.08632 0.080152 x 1.259979 0.510429 2.468471 0.038803 0.082928 2.43703 0.082928 2.43703

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