Calculate the t test stastic using the following formula. 2. Find the P value using Excel (i.e., =T.DIST.RT(t,df). What is it? 3. Compare the P-value to the signifcance level. How do they compare?
ata Set 12 “Passive and Active Smoke” in Appendix B includes cotinine levels measured in a group of nonsmokers exposed to tobacco smoke (n = 40, Mean = 60.58 ng>mL, s = 138.08 ng>mL) and a group of nonsmokers not exposed to tobacco smoke (n = 40, Mean = 16.35 ng>mL, s = 62.53 ng>mL). 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.
1. Calculate the t test stastic using the following formula.
2. Find the P value using Excel (i.e., =T.DIST.RT(t,df). What is it?
3. Compare the P-value to the signifcance level. How do they compare?
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