A motorist found that the efficiency of her engine could be increased by adding lubricatingoil to fuel. She experimented with different amounts of lubricating oil and the data areAmount of lubricating oil (ml)Efficiency (%)0 25 50 75 100| 60 70 75 81 84(a) Obtain the least squares fit of a straight line to the amount of lubricatingoil.(b) Test whether or not the slope B, = 0. Take a = 0.05 as your level ofsignificance.(c) Construct a 90% confidence interval on the mean response at xo = 10 ml.

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Description: A motorist found that the efficiency of her engine could be increased by adding lubricatingoil to fuel. She experimented with different amounts of lubricating oil and the data areAmount of lubricating oil (ml)Efficiency (%)0 25 50 75 100| 60 70 75 8

a. Let us denote X as the amount of lubricating oil and Y as the efficiency. Excel Procedure: Enter…

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A motorist found that the efficiency of her engine could be increased by adding lubricating oil to fuel. She experimented with different amounts of lubricating oil and the data are Amount of lubricating oil (ml) | 0 25 50 75 100 Efficiency (%) 60 70 75 81 84

A motorist found that the efficiency of her engine could be increased by adding lubricating oil to fuel. She experimented with different amounts of lubricating oil and the data are Amount of lubricating oil (ml) | 0 25 50 75 100 Efficiency (%) 60 70 75 81 84

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

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A motorist found that the efficiency of her engine could be increased by adding lubricating
oil to fuel. She experimented with different amounts of lubricating oil and the data are
Amount of lubricating oil (ml)
Efficiency (%)
0 25 50 75 100
| 60 70 75 81 84
(a) Obtain the least squares fit of a straight line to the amount of lubricating
oil.
(b) Test whether or not the slope B, = 0. Take a = 0.05 as your level of
significance.
(c) Construct a 90% confidence interval on the mean response at xo = 10 ml.

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