An environmentalist wants to find out the fraction of oil tankers that

akutagawatj

akutagawatj

Answered question

2021-12-03

An environmentalist wants to find out the fraction of oil tankers that have spills each month.
Suppose a sample of 273 tankers is drawn. Of these ships, 194 did not have spills. Using the data, construct the 85% confidence interval for the population proportion of oil tankers that have spills each month. Round your answers to three decimal places.

Answer & Explanation

Louis Gregory

Louis Gregory

Beginner2021-12-04Added 14 answers

Step 1
Given Data:
p=194273=0.7106
n=273
z-value corresponding to 85% Confidence level =1.44
Step 2
85% Confidence Interval for Population proportion:
p±z×p(1p)n
0.7106±1.44×0.7106(10.7106)273
(0,671, 0.750)
Answer: (0.671, 0.750)

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