 Example 2. 62 percent of voters in a random sample of 400 registered voters (polled on February 20, 2004) said that they favor John Kerry over George W. Bush for President in the 2004 Presidential election. This supports with a probability of at least .95 the following conclusion: Between 57 percent and 67 percent of all registered voters favor Kerry over Bush for President (at or around the time the poll was taken).