format
A numeric vector with 15 elements containing air lead concentrations ($\mu g/m^3$).source
Krishnamoorthy, K., T. Matthew, and G. Ramachandran. (2006).
Generalized P-Values and Confidence Intervals: A Novel Approach for Analyzing
Lognormally Distributed Exposure Data.
Journal of Occupational and Environmental Hygiene, 3, 642--650.