Answer to Question #71511 in Statistics and Probability for Dave

Question

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 _