A store is conducting a customer satisfaction survey. Which of the following would most likely lead to a biased sample?

Question

selecting female customers who purchase an item
selecting random customers at the checkout
selecting every fourth customer who comes into the store
selecting 100 customers from a customer list at random

Answer 1

The option that would most likely lead to a biased sample is:

selecting female customers who purchase an item.

This method does not represent the entire customer base, as it excludes male customers and those who may not purchase an item during the survey period, thus introducing bias based on gender and purchase behavior. The other options involve more random sampling methods that are likely to yield a more representative sample of the store's customer base.