Roger mows lawns for $15 minus $3 per lawn for gas. find M the number of lawns he needs to mow to make $100?
2 answers:
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Answer:
<em>The 99% confidence interval for the population proportion of oil tankers that have spills each month.</em>
<em>(0.6489 , 0.7311)</em>
Step-by-step explanation:
<u><em>Step(i)</em></u>:-
Given sample size 'n' = 836
Suppose a sample of 836 tankers is drawn. Of these ships, 577 did not have spills.
sample proportion
<em>The 99% confidence interval for the population proportion is determined by</em>
<em></em><em></em>
<u><em>Step(ii)</em></u><em>:-</em>
<em>The Z- value = 2.576</em>
<em></em><em></em>
<em>On calculation , we get</em>
<em>(0.690 - 0.0411 , 0.690 + 0.0411)</em>
<em>(0.6489 , 0.7311)</em>
<u><em>Final answer</em></u><em>:-</em>
<em>The 99% confidence interval for the population proportion of oil tankers that have spills each month.</em>
<em>(0.6489 , 0.7311)</em>
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