Analysis of waybill data.

Users of the waybill sample when presenting waybill analysis before the Board shall ensure that the appropriate weighting factors are applied to account for the stratified sampling. See Statement 81-1 for guidelines for weighting waybill data and for computing sampling errors. [46 FR 26784, May 15, 1981. Redesignated at 65 FR 37711, June 16, 2000]