Passage Summary: A radio station thinks it's a hit because its callers say so, but a critic points out that's like asking a politician's biggest fans if they like the politician—it's not a fair test.

Conclusion: The radio station's evidence for its new format's popularity is not actually convincing.

Reasoning: The station relies on feedback from people who call in, which is a biased sample similar to polling only a candidate's committed supporters to determine their general popularity.

Analysis: The critic uses an analogy to demonstrate a flaw in the station's logic. By comparing the radio callers to a political candidate's base, the critic highlights that the sample is self-selecting and unrepresentative of the general public. In your evaluation, focus on how the argument uses a parallel, obviously flawed scenario to illustrate why the original evidence is statistically weak. It's a classic 'biased sample' takedown.