Suppose that the United States decides conducting the Censusevery 10 years is to

Suppose that the United States decides conducting the Censusevery 10 years is too expensive. Instead a suggestion is made toin the year 2000 conduct a survey by selecting a simple randomsample of email addresses and questioning people electronicallyobtaining the same information that would be obtained in adoor-to-door census. What type of major error is certain to occurwith this sampling method?