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11.9 A manufacturer of cases for sound equipment requires that holes be drilled for metal screws. The drill bits wear out and must be replaced; there is expense not only in the cost of the bits but also in the cost of lost production. Engineers varied the rotation speed of the drill and measured the lifetime y (thousands of holes drilled) of four bits at each of five speeds x. The data were: 60 60 0 60 80 80 80 80 100 100 y 4.6 3.8 4.9 4.5 4.7 5.8 5.55.4 5.0 4.5 x 100 100 120 120 120 120 140 140 140 140 У 3.2 4.8 4.1 4.5 4.0 3.8 3.6 3.0 3.5 3.4 a. Create a scatterplot of the data. Does there appear to be a relation? Does it appear to be linear? b. Is there any evident outlier? If so, does it have high influence?

11.9 A manufacturer of cases for sound equipment requires that holes be drilled for metal screws. The drill bits wear out and must be replaced; there is expense not only in the cost of the bits but also in the cost of lost production. Engineers varied the rotation speed of the drill and measured the lifetime y (thousands of holes drilled) of four bits at each of five speeds x. The data were: 60 60 0 60 80 80 80 80 100 100 y 4.6 3.8 4.9 4.5 4.7 5.8 5.55.4 5.0 4.5 x 100 100 120 120 120 120 140 140 140 140 У 3.2 4.8 4.1 4.5 4.0 3.8 3.6 3.0 3.5 3.4 a. Create a scatterplot of the data. Does there appear to be a relation? Does it appear to be linear? b. Is there any evident outlier? If so, does it have high influence?

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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11.9 A manufacturer of cases for sound equipment requires that holes be drilled for metal screws. The drill bits wear out and must be replaced; there is expense not only in the cost of the bits but also in the cost of lost production. Engineers varied the rotation speed of the drill and measured the lifetime y (thousands of holes drilled) of four bits at each of five speeds x. The data were: 60 60 0 60 80 80 80 80 100 100 y 4.6 3.8 4.9 4.5 4.7 5.8 5.55.4 5.0 4.5 x 100 100 120 120 120 120 140 140 140 140 У 3.2 4.8 4.1 4.5 4.0 3.8 3.6 3.0 3.5 3.4 a. Create a scatterplot of the data. Does there appear to be a relation? Does it appear to be linear? b. Is there any evident outlier? If so, does it have high influence?
Transcribed Image Text:11.9 A manufacturer of cases for sound equipment requires that holes be drilled for metal screws. The drill bits wear out and must be replaced; there is expense not only in the cost of the bits but also in the cost of lost production. Engineers varied the rotation speed of the drill and measured the lifetime y (thousands of holes drilled) of four bits at each of five speeds x. The data were: 60 60 0 60 80 80 80 80 100 100 y 4.6 3.8 4.9 4.5 4.7 5.8 5.55.4 5.0 4.5 x 100 100 120 120 120 120 140 140 140 140 У 3.2 4.8 4.1 4.5 4.0 3.8 3.6 3.0 3.5 3.4 a. Create a scatterplot of the data. Does there appear to be a relation? Does it appear to be linear? b. Is there any evident outlier? If so, does it have high influence?
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