gallup said they use both land line and cell phone for surveying

来源: quantnj 于 2012-11-02 07:00:33 [] [旧帖] [给我悄悄话] 阅读数 : (0 bytes)

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• 呵呵，talking about confirmation bias... -wxc1949- ♂ 给 wxc1949 发送悄悄话 (0 bytes) () 11/02/2012 postreply 07:06:17

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