Answer Happy

The NCHS report indicated that in 2013 the prevalence of teen smoking was 14.2%. A researcher gathered data on teen smoking from the same year and found about 21.1% of his sample of teens (n=459) smoked. Based on hypothesis testing to detect a difference between the prevalence of smoking in this researcher's sample compared and the NCHS prevalence, which one of the following statements is correct? (Alpha level is set at 0.05.) One should run a one-sample t test to answer this research question. O The obtained test statistic value is 4.24. O A one-sample test of proportion cannot be conducted to answer this research question, because the assumption, Min[np0, n(1-p0)] equal to or greater than 5, is violated. We fail to reject the null hypothesis at the alpha level of .05.