Advice columnist Ann Landers once asked her divorced readers whether they regret

Question

Advice columnist Ann Landers once asked her divorced readers whether they regretted their decision to divorce. She received approximately 30,000 responses, about 23,000 of which came from women. Nearly 75% said they were glad they divorced, and most of them said they wished they had done it sooner. Explain why this sample is certainly biased. What is the likely direction of the bias? That is, is 75% probably higher or lower than the truth about the population of all adults who have been divorced?

Explanation / Answer

Explain why this sample is certainly biased. What is the likely direction of the bias?

This survey is biased by voluntary participation (its their wish whether to give reponseor not) and probably overestimates that percentage who are glad they divorced means 75% of population.

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