An environmentalist wants to find out the fraction of oil tankers that have spills each month.

Step 1 of 2:Suppose a sample of250 tankers is drawn. Of these ships,198did not have spills. Using the data, estimate the proportion of oil tankers that had spills. Enter your answer as a fraction or a decimal number rounded to three decimal places.

Step 2 of 2:Suppose a sample of250tankers is drawn. Of these ships,198 did not have spills. Using the data, construct the85% confidence interval for the population proportion of oil tankers that have spills each month. Round your answers to three decimal places.