Question

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

Step 1 of 2 :  

Suppose a sample of 1453 tankers is drawn. Of these ships, 1018 did 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.

Answer 1

Solution:

Given: a sample of 1453 tankers is drawn. Of these ships, 1018 did not have spills.

That is:

Sample Size = n = 1453

Number of ships did not have spills = 1018

Then

x = Number of oil tankers that had spills = 1453 - 1018 = 435

We have to find  the proportion of oil tankers that had spills.

Thus sample proportion is given by:

(  a decimal number rounded to three decimal places)

Thus the proportion of oil tankers that had spills is 0.299