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Airline On-Time Tables - April 2015

Table 1 Summary of Airline On-Time Performance Year-to-date through April 2015 Table 2 Ranking of Airline On-Time Performance by Month Since 1995 Table 3 Ranking of Major Airport On-Time Arrival Performance in April 2015 Table 4 Ranking of Major Airport On-Time Arrival Performance Year-to-...

Appendix C. Sample Design, Data Collection, and Estimation

INTRODUCTION

The primary goal for the 2012 Commodity Flow Survey (CFS) was to estimate shipping volumes (value, tons, and ton-miles) by commodity and mode of transportation at varying levels of geographic detail. A secondary objective was to estimate the volume of shipments moving from...

Appendix B. Reliability of the Estimates

INTRODUCTION

The estimates presented by the 2012 CFS may differ from the actual, unknown population values. The difference between the estimate and the population value is known as the total error of the estimate. When describing the accuracy of survey results, it is convenient to...