Question: Use the following confidence level interval limits to find the point estimate and the margin of error E .

An aquatic site adjacent to an old wood chipping mill is being studied to determine whether environmental liabilities exist from previous wood chipping operations. Because wood chips can leach toxic compounds into the water, environmental consultants measure the proportion of wood chips found in samples taken from various sediment cores. They find the confidence interval of the proportion of wood chips from .194 to .228 actually does contain the true value of p .