Physicians measured blood lead levels in a random sample of 101 painting contractors in several states. The measured lead levels had a sample mean of 27.2 μg/dL (micrograms per deciliter) and a sample standard deviation of 16.1 μg/dL. Calculate the 95% confidence interval for the true mean. Use the appropriate z-table or t-table B. (24.3, 29.5) (25.0, 28.0) (25.2, 29.2) (25.6, 28.9)