long it takes, on average, to complete a coronary artery bypass surgery. She samples 25 surgeries and logs the time it takes to complete each one, in hours: 6.2, 5.8, 6.1, 6.2, 5.6, 6, 5.6, 5.9, 5.7, 5.9, 5.8, 5.5, 6.1, 6.3, 6.4, 5.9, 6.2, 5.7, 6.2, 5.4, 5.8, 5.6, 5.4, 6.1, 5.7 Assuming the population standard deviation is σ=0.25, construct a 89% confidence interval for the average time it takes to complete a coronary artery bypass surgery. xˉ=x̄= α2= zα2= Margin of Error: E= We are 89% confident that the mean amount of time it takes to complete a coronary bypass sugery is between ___hours and___

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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 25 surgeries and logs the time it takes to complete each one, in hours:

6.2, 5.8, 6.1, 6.2, 5.6, 6, 5.6, 5.9, 5.7, 5.9, 5.8, 5.5, 6.1, 6.3, 6.4, 5.9, 6.2, 5.7, 6.2, 5.4, 5.8, 5.6, 5.4, 6.1, 5.7

Assuming the population standard deviation is σ=0.25, construct a 89% confidence interval for the average time it takes to complete a coronary artery bypass surgery.

xˉ=x̄=

α2=

zα2=

Margin of Error: E=

We are 89% confident that the mean amount of time it takes to complete a coronary bypass sugery is between ___hours and___ hours.

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