Using StatCrunch* and the available data, construct a 99% Confidence Interval for the proportion of all patients experiencing High CoVID-19 severity if they are a Never Smoker.

MATLAB: An Introduction with Applications
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ISBN:9781119256830
Author:Amos Gilat
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Using StatCrunch* and the available data, construct a 99% Confidence Interval for the proportion of all patients experiencing High CoVID-19 severity if they are a Never Smoker.

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Step 1

3 )Solution:

Part(a): p = (136 + 64)/(87 + 15 + 43 + 9 + 136 + 64)

= 0.565

The 99% confidence interval will be:

= p ± z*(√p(1-p)/n)

= 0.565 ± 2.576*(√0.565(1-0.565)/354)

= (0.4971, 0.6328)

Part(b):

We are 99% confident that the true proportion of all patients experiencing high Covid-19 severity if they are a
Never Smoker is between 0.4971 and 0.6328

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