MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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"Durable press" cotton fabrics are treated to improve their recovery from wrinkles after washing. "Wrinkle
recovery angle" measures how well a fabric recovers from wrinkles. Higher is better. Here are data on the
wrinkle recovery angle (in degrees) for two types of treated fabrics:
Permafresh
15
12
16
13
11
14
10
Hylite
16
20
18
15
19
A manufacturer wants to know how large is the difference in mean wrinkle recovery angle.
Give a 90% confidence interval for the difference in mean wrinkle recovery angle:
[three decimal accuracy] [three decimal accuracy]
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Transcribed Image Text:"Durable press" cotton fabrics are treated to improve their recovery from wrinkles after washing. "Wrinkle recovery angle" measures how well a fabric recovers from wrinkles. Higher is better. Here are data on the wrinkle recovery angle (in degrees) for two types of treated fabrics: Permafresh 15 12 16 13 11 14 10 Hylite 16 20 18 15 19 A manufacturer wants to know how large is the difference in mean wrinkle recovery angle. Give a 90% confidence interval for the difference in mean wrinkle recovery angle: [three decimal accuracy] [three decimal accuracy]
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