A surgeon would like to know how long it takes, on average, to complete a coronary artery bypass surgery. She samples 22 surgeries and logs the time it takes to complete each one, in hours: 5.9, 3.5, 3.4, 4.7, 8.2, 5.9, 4.5, 4.9, 5.3, 3.6, 4.3, 5.9, 4.6, 4.8, 8.1, 5, 7, 5.4, 6.1, 5.8, 3.8, 6.7 Construct a 95% confidence interval for the average time it takes to complete a coronary artery bypass surgery. xˉ= s= α2= tα2= Margin of Error: E= We are 95% confident that the mean amount of time it takes to complete a coronary bypass sugery is between ___hours and ____hours.

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