The [[Centers for Disease Control and Prevention]]'s report regarding how mobile phones have taken over the American household and taken the place of the land line telephone is interesting.  The CDC is a major user of telephone survey techniques to ascertain social dimensions and direct-from-the-public statistics on obesity, use of cigarettes, cellphones and other factors. But, if the use of land lines are not representative of the US population, missing disproportionate members of youth and urban populations, they could be in trouble.

The surveys that the CDC would be doing would be without, like the survey said, large portions of citizens, as well as a considerable percentage of the South (17.1%) and Midwest (15.3%) would not be available participate in surveys as they had gone completely wire-less. 

If the CDC were to  have a survey with a sizable amount of possible respondents not connected to land line phones, those totals would be very controversial as the CDC not have a complete and would in fact have probably a biased survey completed. I guess they'll have to figure out how to randomly access mobile users.

Maybe they should send an SMS to the mobile user asking them permission to call and participate in the survey?

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