what is the difference between a national and local data set how to compare the data from a town to a national survey how is data comparison different than data what is the difference from a national survey how to compare the different travel modes how to compare the naissan survey data with the national survey average trip number from travel mode how to compare different travel methods how to compare average trips how to compare the data on the day of a national survey difference in scale between national surveys and town surveys how to compare the data from a national survey how to compare data with differences in scales how to compare a town with the national how does a nationwide survey compare to a town survey? how to compare the scale of travel survey compare scales in travel survey can we compare the data for the towns difference between a national survey and travel mode data difference between national and rural survey