Using a simple random sample, they select 400 boys and 300 girls to participate in the study. Forty percent of the boys say that Superman is their favorite character, compared to thirty percent of the girls. What is the 95% confidence interval for the true difference in attitudes toward Superman?

Suppose the Cartoon Network conducts a nation-wide survey to assess viewer attitudes toward Superman. Using a simple random sample, they select 400 boys and 300 girlsto participate in the study. Forty percent of the boys say that Superman is their favorite character, compared to thirty percent of the girls. What is the 95%
confidence interval for the true difference in attitudes toward Superman?

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