Question

Sales and Advertising Expenditures for a Sample of Seven Travel Agencies Firm Sales Advertising A 15000...

Sales and Advertising Expenditures for a Sample of Seven Travel Agencies

Firm

Sales

Advertising

A

15000

2000

B

30000

2000

C

30000

5000

D

25000

3000

E

55000

9000

F

45000

8000

G

60000

7000

Using Excel, generate a regression output and discuss the results, the interpretation of the output and statistical properties of a model.

Homework Answers

Answer #1
SUMMARY OUTPUT
Regression Statistics
Multiple R 0.874781011
R Square 0.765241817
Adjusted R Square 0.718290181
Standard Error 8782.643763
Observations 7
ANOVA
df SS MS F Significance F
Regression 1 1257182986 1.26E+09 16.29851 0.009950761
Residual 5 385674157.3 77134831
Total 6 1642857143
Coefficients Standard Error t Stat P-value Lower 95% Upper 95% Lower 95.0% Upper 95.0%
Intercept 11573.03371 7150.826978 1.618419 0.166497 -6808.752226 29954.81964 -6808.752226 29954.81964
Advertising 4.971910112 1.231542173 4.037142 0.009951 1.806130173 8.137690051 1.806130173 8.137690051
Regression equation:
* Sales = 11573.033 + 4.972*(Advertising)
* The regression result shows that the sales is positively related to advertising. An increase
in the advertising by $1 will lead to increase in sales by $4.97.
* The R2 = 0.76 shows that the independent variable advertising explains 76% of the
variation in dependent variable sales..
* The t-statistic associated with variables sales is greater than 3 shows that the sales
variable is statistically significant.
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