A process has been developed that can transform ordinary iron into a kind of super iron called metallic glass. Metallic glass is three to four times stronger than the toughest steel alloys. To estimate the mean temperature at which a particular type of metallic glass becomes brittle, 20 pieces of this material were randomly sampled from a recent production run. Each piece was subjected to higher and higher temperatures until it became brittle. The temperature at which brittleness first appeared was recorded for each piece in the sample. The result suggests that the average temperature which brittleness first appeared is about 455 degrees Fahrenheit with a standard deviation of 36 degrees Fahrenheit. Calculate the length of the 95% confidence interval for the mean temperature at which a particular type of metallic glass becomes brittle.

MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
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Chapter1: Starting With Matlab
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Round your answer to 4 decimal places.
A process has been developed that can transform
ordinary iron into a kind of super iron called metallic
glass. Metallic glass is three to four times stronger
than the toughest steel alloys. To estimate the mean
temperature at which a particular type of metallic
glass becomes brittle, 20 pieces of this material
were randomly sampled from a recent production
run. Each piece was subjected to higher and higher
temperatures until it became brittle. The
temperature at which brittleness first appeared was
recorded for each piece in the sample. The result
suggests that the average temperature which
brittleness first appeared is about 455 degrees
Fahrenheit with a standard deviation of 36 degrees
Fahrenheit. Calculate the length of the 95%
confidence interval for the mean temperature at
which a particular type of metallic glass becomes
brittle.
Transcribed Image Text:A process has been developed that can transform ordinary iron into a kind of super iron called metallic glass. Metallic glass is three to four times stronger than the toughest steel alloys. To estimate the mean temperature at which a particular type of metallic glass becomes brittle, 20 pieces of this material were randomly sampled from a recent production run. Each piece was subjected to higher and higher temperatures until it became brittle. The temperature at which brittleness first appeared was recorded for each piece in the sample. The result suggests that the average temperature which brittleness first appeared is about 455 degrees Fahrenheit with a standard deviation of 36 degrees Fahrenheit. Calculate the length of the 95% confidence interval for the mean temperature at which a particular type of metallic glass becomes brittle.
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