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Following an advertising campaign, we wanted to verify whether the percentage of people who said they knew about Axcedull soap (from 40%) had increased. Out

Following an advertising campaign, we wanted to verify whether the percentage of people who said they knew about Axcedull soap (from 40%) had increased. Out of 1000 people interviewed, a total of 430 people said they knew about Axcedull soap. Can we say with 99% confidence that the percentage of people who know about Axcedull soap has increased significantly?

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