Classify the following samples as biased or unbiased.

Question

1. A sports league randomly selects five players from each team to complete a survey about fan behavior. (Biased / Unbiased)

2. A department store asks customers to visit the store’s website and take a survey concerning their shopping experience. (Biased / Unbiased)

Answer 1

1. unbiased - random sample
2. biased - only those with interest to volunteer are sampled. Those with strong feelings about shopping experience are more likely to respond.