Answer Happy

The NCHS report indicated that in 2000 the prevalence of teen smoking was 14.1%. A researcher gathered data on teen smoking from the same year and found about 20% of his sample of teens (n=212) 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.) O The obtained test statistic value is 2.47. O A one-sample test of proportion cannot be conducted to answer this research question, because the assumption, Min[np0, n(1-p0)] equal or greater than 5, is violated. O One should run a one-sample t test to answer this research question. O We fail to reject the null hypothesis at the alpha level of .05.