SOLUTION: A convenience store asked every 21st person who entered the store for a week, their opinion of the automatic checkout machines. Is this an unbiased sample? Give a reason for your c

Question 460883: A convenience store asked every 21st person who entered the store for a week, their opinion of the automatic checkout machines. Is this an unbiased sample? Give a reason for your conclusion.
Answer by richard1234(7193) (Show Source): You can put this solution on YOUR website!
From the standpoint of one who has never taken statistics, I would say it is unbiased because the feedback from the customers should have no correlation with the customers' positions in line.
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