Alex is conducting a survey for a car company. She decides to start by interviewing some people in her neighborhood. She prepares a questionnaire and emails it to 50 neighbors who own cars. Of those neighbors, 24 respond. Why is this sample likely to be biased?

Question

Mathematics

Anabel Warner

5 December, 13:09

Alex is conducting a survey for a car company. She decides to start by interviewing some people in her neighborhood. She prepares a questionnaire and emails it to 50 neighbors who own cars. Of those neighbors, 24 respond. Why is this sample likely to be biased?

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Anna White · Answer 1

1). Her sample is all from the same socio-economic group ... the people

who live in HER neighborhood.

2). Even from those, she only gets any information from about half of them.