суббота, 3 марта 2012 г.

A CASE FOR SCIENTIFIC SAMPLING.(MAIN)

Byline: ROBERT RENO

Suppose a major corporation were planning a billion-dollar product launch and needed detailed data on households in a given region: their incomes, assets, size, ages and employment.

Naturally, the corporation would go to the latest U.S. Census data, which is a gold mine of such information. But what if the company were given the choice of using one of two sets of data -- one derived solely by door-to-door interviews and another improved by scientific sampling methods?

It would be a no-brainer. Since conventional counting data missed 4 million warm, breathing Americans in the last census, it was like conducting an actual head …

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