Passive and Active Smoke In a group of nonsmokers exposed to tobacco smoke n=40,samplemean=60.58,s=138.08n=40,samplemean

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Passive and Active Smoke
In a group of nonsmokers exposed to tobacco
smoke n=40,samplemean=60.58,s=138.08n=40,samplemean=60.58,s=138.08
In a group of nonsmokers not exposed to tobacco
smoke n=40,samplemean=16.35,s=62.53n=40,samplemean=16.35,s=62.53
Cotinine is a metabolite of nicotine, meaning that when nicotine
is absorbed by the body, cotinine is produced.
use a 0.05 significance level to test the claim that nonsmokers
exposed to tobacco smoke have a higher mean cotinine level than
nonsmokers not exposed to tobacco smoke.
Find its critical value