When Ann Landers asked her readers to tell her "if your sex life has gone downhill after marriage," more than 100,000 people responded. This is an example of

Question

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This is an example of a voluntary response sample, where individuals choose whether or not to participate in the survey. It is not a representative sample of the general population, as those who respond may have strong opinions or experiences that differ from the broader population.

When Ann Landers Asked Her Readers to Tell Her "If