3.36 Satisfying Congress.Exercise 3.19 describes a sample survey of 1028 adults, with margin of error +4 for 95% confidence.

1. A member of Congress thinks that 95% confidence is not enough. He wants to be 99% confident. How would the margin of error for 99% confidence based on the same sample compare with the margin of error for 95% confidence?
2. Another member of Congress is satisfied with 95% confidence, but she wants a smaller margin of error than +4 percentage points. How can we get a smaller margin of error, still with 95% confidence?