The claim is that smokers have a mean cotinine level greater than the level of 2.84 ng / mL found for nonsmokers . (Cotinine is used as a biomarker for exposure to nicotine . ) The sample size is n = 843 and the test statistic is t = 57.792 . Use technology to find the P-value . Based on the result what is the final conclusion ? Use a significance level of 0.10