Groups of non-smokers who were not exposed to smoke and non-smokers who were exposed to secondhand smoke were sampled to test their cotinine levels (ng/mL). Using a 0.05 significance level, test the...

Groups of non-smokers who were not exposed to smoke and non-smokers who were exposed to secondhand smoke were sampled to test their cotinine levels (ng/mL). Using a 0.05 significance level, test the claim that non-smokers exposed to tobacco smoke have higher mean cotinine levels than non-smokers that are not exposed.

Exposed to secondhand smoke: n=40, x̅=60.58, s=138.08

Not exposed to secondhand smoke: n=40, x̅=16.35, s=62.53

1. H^0=?

2. H^1=?

3. Critical value(s):?

4. Graph rejection regions with labelled critical value(s)

5. Test statistic: State what test stat is being used (z,t,etc.) the formula being used, and what values are substituted into the formula.

6. P-value=?

7. State the conclusion of the test in the context of the problem (for example, not just "reject null" but what does it mean for this specific problem):