The carbon monoxide diffusing capacity (DL) for 12 current smokers is listed below. Construct a 95% confidence interval for the mean DL level for current smokers. Be sure to use the computing formula (as shown in class) to calculate the variance.103.77, 88.60, 73.00, 123.09, 91.05, 92.30, 61.68, 90.68, 84.02, 76.01, 100.61, 88.02
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