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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A surgeon would like to know how long it takes, on average, to complete a coronary artery bypass surgery. She samples 27 surgeries and logs the time it takes to complete each one, in hours: 5.5, 4.9, 5.2, 5.2, 5.5, 5.4, 4.8, 5.2, 4.8, 5.3, 5.9, 5.1, 5, 6, 5.2, 5.8, 5.5, 6, 5.3, 5.6, 5.6, 5.4, 5.2, 5.4, 5.6, 5.3, 5.9 Assuming the population standard deviation is o = 0.43, construct a 87% confidence interval for the average time it takes to complete a coronary artery bypass surgery. x = 24 Margin of Error: E We are 87% confident that the mean amount of time it takes to complete a coronary bypass sugery is between hours and hours.
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Transcribed Image Text:A surgeon would like to know how long it takes, on average, to complete a coronary artery bypass surgery. She samples 27 surgeries and logs the time it takes to complete each one, in hours: 5.5, 4.9, 5.2, 5.2, 5.5, 5.4, 4.8, 5.2, 4.8, 5.3, 5.9, 5.1, 5, 6, 5.2, 5.8, 5.5, 6, 5.3, 5.6, 5.6, 5.4, 5.2, 5.4, 5.6, 5.3, 5.9 Assuming the population standard deviation is o = 0.43, construct a 87% confidence interval for the average time it takes to complete a coronary artery bypass surgery. x = 24 Margin of Error: E We are 87% confident that the mean amount of time it takes to complete a coronary bypass sugery is between hours and hours.
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Step 1: sample size, population standard deviation
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Step 2: sample mean, level of significance
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Step 3: get critical value at level of significance
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Step 4: get margin of error
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Step 5: get the confidence interval
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Solution
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