Question 2 • Concepts in Probability and Statistics A
Option 1 surveys only students who leave the gym after sports practice, so students who do not participate in sports may be left out. Their preferences could differ from the rest of the school, making the sample biased. Option 2 randomly selects students from every first-period class, which gives students across those classes a chance to be included; therefore, the true statement is that Option 1 is biased.
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