An insurance company collects data on seat-belt use among drivers in a country. Of 1400 drivers 30-39 years old, 18% said that they buckle up, whereas 379 of 1100 drivers 55-64 years old said that they did. Find a 98% confidence interval for the difference between the proportions of seat-belt users for drivers in the age groups 30-39 years and 55-64 years.
Construct a 98% confidence interval.
The 98% confidence interval for P1−P2 is from _ to _
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