Amedical researcher estimates the percentage of children who are exposed to lead-base paint, adding that he believes his estimate has a margin of error of about 3%. explain what the margin of error means.

Step-by-step explanation:

Margin of error Percentage: A margin of error tells you how many percentage points your results will differ from the real population value. For example, a 90% confidence interval with a 3 percent margin of error means that your statistic will be within 3 percentage points of the real population value 90% of the time.