In DB12, the age distribution of patients undergoing carinal resections is approximately normal with mean = 47.8 years and standard deviation =

14.8 years. The sample is large enough to take the standard deviation as if it were the population

a. You have a 12-year-old patient whose tracheal carina requires resection. Does this patient fall within a 95% confidence limit of age for individual patients, or is this patient improbably young?