A study on nicotine dependence for teenage smokers obtained a random sample of seventh graders. Of those seventh graders in the study who had tried tobacco, the mean HONC score was 2.8 with a standard deviation of 3.62 for the 150 females and mean of 1.6 and standard deviation of 2.92 for the 182 males. Conduct a two-sided significance testing to compare if there is a significant difference between the HONC score of the two genders. Assume 95% confidence level. 1-State the hypotheses. Choose the correct answer. a. H 0 : 1 = 2 ; H a : 1 2 b. H 0 : 1 2 ; H a : 1 > 2 c. H 0 : 1 2 ; H a : 1 < 2 d. H 0 : 1 2 ; H a : 1 > 2

2-Compute for the test statistic

3-What is a critical value for t?

4-Make a conclusion.