13 A Survey of 100 000 Physicians In 2010 the Physicians Foundation con ducted a survey of physicians attitude about health care reform calling the re port a survey of 100 000 physicians The survey was sent to 100 000 randomly selected physicians practicing in the United States 40 000 via post office mail and 60 000 via email A total of 2 379 completed surveys were received a State carefully what population is sampled in this survey and what is the sample size Could you draw conclusions from this study about all physi cians practicing in the United States b What is the rate of nonresponse for this survey How might this affect the credibility of the survey results c Why is it misleading to call the report a survey of 100 000 physicians