A survey of 480 high school students found that 37% had a pet. Find the margin of error. Round to the nearest percent. Use the margin of error to find an interval that is likely to contain the true population proportion.
* margin of error = +-5%
interval, 37% to 42%
* margin of error = +-5%
interval, 32% to 42%
* margin of error = +-7%
interval, 30% to 44%
* margin of error = +-7%
interval, 37% to 44%