Passage Summary: A club president wanted to know if a Tuesday meeting time was the reason for low attendance, so they asked the people who showed up on Tuesday if Tuesday worked for them. Since almost everyone there said yes, the president decided the schedule wasn't the problem.

Conclusion: The primary cause of the club's low attendance is not related to scheduling conflicts.

Reasoning: A survey conducted during a Tuesday meeting showed that 95 percent of the members who were there had no trouble attending on that day.

Analysis: The president has committed a textbook sampling error by surveying a group that is inherently biased toward the status quo. By only asking the people who actually showed up on Tuesday, the president is ignoring the very people whose absence defines the 'attendance problem.' Those who have schedule conflicts are, by definition, the ones most likely to be missing from that meeting. Look for an answer that highlights this unrepresentative sample—it's like asking people at a stadium if they have trouble finding transportation to the game.