An entrepreneur wants to know the extent of the relationship between sales results and advertisements through online med

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An entrepreneur wants to know the
extent of the relationship between sales results and advertisements
through online media and newspapers. From past experiences, the
facts are shown in the table:
Sales
advertisement
Online
Newspaper
110
80
70
100
90
50
120
60
70
7
6
6
8
7
5
8
5
7
7
6
5
6
6
4
7
5
6
Pertanyaan:
a. Find the equation of the multiple
regression line.
b. Determine the magnitude of the
multiple correlation coefficient.
c. Test the significance of the
regression, either partially or simultaneously, with α = 5%.
d. If the company wants to increase
its sales results to 15000, while the cost of Advertising through
OnLine Media is 800. How much is the cost of Newspaper Advertising
to be spent?