A method of data collection which would most likely lead to a biased sample is interviewing customers who call an 800 number posted on the costumers receipts.
A sampling bias simply refers to a type of bias in which members of a certain population are selected in such a way that some members have a lower or higher sampling probability than the other members.
This ultimately implies that, a sampling bias occur when members of a certain population are selected incorrectly such as interviewing only the customers who call an 800 number which was posted on the costumers receipts.
Read more on sampling bias here: https://brainly.com/question/19671065
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