A newspaper posted this question on its web "How often do you seek medical information online?" Of 1072 Internet users who chose to respond, 38% of them responded with "frequently." What term is used to describe this type of survey in which the people surveyed consist of those who decided to respond? What is wrong with this type of sampling method?

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Mathematics

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17 January, 13:44

A newspaper posted this question on its web "How often do you seek medical information online?" Of 1072 Internet users who chose to respond, 38% of them responded with "frequently." What term is used to describe this type of survey in which the people surveyed consist of those who decided to respond? What is wrong with this type of sampling method?

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Carlson · Answer 1

"How often do you seek medical information online?"

Of 1072 Internet users who chose to respond, 38% of them responded with "frequently."

The respondents here are voluntary response sample and are a self-selected sample.

The thing that is wrong here, it that it is possible that many people read the survey but may choose not to respond and also the few responses will not reflect the opinions of all the population.