do surveys show a significant difference in the data. how many waves is a response bias test what is the difference between response bias and non response bias what is non respond bias when is the time between data waves inconsistent time span in between waves what is the difference between a response bias and a non response bias why do sms ask for non responder bias what is non response bias time span between waves is not consistent non response bias definition is time span between waves consistent which data sets demonstrate a significant time difference between the waves what is non response bias what is non respond bias why is there non response bias what is non response bias how many waves of data do i have how to test for non responder bias how is time between waves different?