The makers of a pie crust mix have baked test pies and collected the following data on y 5 amount of crispness (a rating of 1 to 100), x1 5 minutes in the oven, and x2 5 oven temperature (degrees Fahrenheit).
|
during the following week. The results are shown in the
|
y
|
x1
|
x2
|
|
table below.
|
68
|
6.0
|
460
|
|
New Ad Column- Discount
|
76
|
8.9
|
430
|
|
Club
|
Visitors, y
|
Inches, x1
|
Amount, x2
|
49
|
8.8
|
360
|
|
1
|
23
|
4
|
$100
|
99
|
7.8
|
460
|
|
2
|
30
|
7
|
20
|
90
|
7.3
|
390
|
|
3
|
20
|
3
|
40
|
32
|
5.3
|
360
|
|
4
|
26
|
6
|
25
|
96
|
8.8
|
420
|
|
5
|
20
|
2
|
50
|
77
|
9.0
|
350
|
|
6
|
18
|
5
|
30
|
94
|
8.0
|
450
|
|
7
|
17
|
4
|
25
|
82
|
8.2
|
400
|
|
8
|
31
|
8
|
80
|
97
|
6.4
|
450
|
a. Determine the least-squares multiple regression equation.
b. Interpret the y-intercept and partial regression coefficients.
c. What is the estimated number of new visitors to a club if the size of the ad is 5 column-inches and a $75 discount is offered?
a. Determine the least-squares multiple regression equation.
b. Interpret the y-intercept and partial regression coefficients.
c. What is the estimated crispness rating for a pie that is baked for 5 minutes at 200 degrees?