A new type of fabric is claimed to be wrinkle- free. There are other wrinkle-free fabrics in the market, but how can these be compared? Comparison is done by measuring the wrinkle recovery angle (WRA) of the fabric, in degrees. Higher is better. The current top brand in the market claims that their fabrics have a WRA of 141 degrees on the average. A sample of fabrics from the new type were subjected to tests in order to measure their WRA and the following observations were obtained: 137 144 146 139 140 141 137 138 146 142 144 135 141 139 140 Test the hypothesis that the population mean of the WRAs of the new type of fabric exceeds that of the current top brand. Use a = 0.05.
A new type of fabric is claimed to be wrinkle- free. There are other wrinkle-free fabrics in the market, but how can these be compared? Comparison is done by measuring the wrinkle recovery angle (WRA) of the fabric, in degrees. Higher is better. The current top brand in the market claims that their fabrics have a WRA of 141 degrees on the average. A sample of fabrics from the new type were subjected to tests in order to measure their WRA and the following observations were obtained: 137 144 146 139 140 141 137 138 146 142 144 135 141 139 140 Test the hypothesis that the population mean of the WRAs of the new type of fabric exceeds that of the current top brand. Use a = 0.05.
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
Related questions
Question
Answer the following:
1. Test Stat
2. Critical Region:
Select one:
a. T1.761
c. T>2.14
d. T>abs(2.145)
3. Conclusion: At 5% level of significance…
Select one:
a. the new type of fabric does not exceed the WRA of the top current brand
b. the new type of fabric exceeds the WRA of the top current brand
Transcribed Image Text:A new type of fabric is claimed to be wrinkle-
free. There are other wrinkle-free fabrics in
the market, but how can these be compared?
Comparison is done by measuring the wrinkle
recovery angle (WRA) of the fabric, in
degrees. Higher is better. The current top
brand in the market claims that their fabrics
have a WRA of 141 degrees on the average. A
sample of fabrics from the new type were
subjected to tests in order to measure their
WRA and the following observations were
obtained:
137
144
146
139
140
141
137
138
146
142
144
135
141
139
140
Test the hypothesis that the population mean
of the WRAs of the new type of fabric
exceeds that of the current top brand. Use a =
0.05.
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