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MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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Also entered 29.7748 and that answer was also incorrect

Transcribed Image Text:62x12 + 63x2 + 64x22 + ɛ, calculate the point estimate. (Moreover, consider the mean mileage
Using the model, y = 60 + 61×1 +
obtained by all gallons of the gasoline when it is made with one unit of RST and two units of XST (a combination that the data on
the page margin indicates would maximize mean mileage). Do not round intermediate calculations. Round your answer to 4
decimal places.)
Answer is complete but not entirely correct.
Point estimate
33.4801

Transcribed Image Text:United Oil Company is attempting to develop a reasonably priced unleaded gasoline that will deliver higher gasoline mileages than
can be achieved by its current unleaded gasolines. As part of its development process, United Oil wishes to study the effect of two
independent variables-x1, amount of gasoline additive RST (0, 1, or 2 units), and x2, amount of gasoline additive XST (0, 1, 2, or 3
units), on gasoline mileage, y. Mileage tests are carried out using equipment that simulates driving under prescribed conditions. The
combinations of x1 and x2 used in the experiment, along with the corresponding values of y, are given below.
RST
XST
Gas
Units
Units
Mileage
(y, mpg)
(x1)
(x2)
27.19
28.10
28.14
1
29.62
1
30.07
2
28.75
2
29.85
1
32.43
1
33.08
1
1
33.96
1
1
34.85
2
32.23
2
33.99
1
2
34.32
1
35.45
1
2
35.24
2
2
33.06
2
34.18
34.40
3
33.12
3
33.52
3
33.53
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