# Question: Refer to Example 6 Teenagers on Nicotine Of those who

Refer to Example 6, “Teenagers on Nicotine.” Of those who had tried tobacco, the mean HONC score was 2.8 (s = 3.6) for the 150 females and 1.6 (s = 2.9) for the 182 males.

a. Find a standard error for comparing the sample means. Interpret.

b. Find the test statistic and P-value for H0: μ1 = μ2 against Ha: μ1 ≠ μ2. Interpret, and explain what (if any) effect gender has on the mean HONC score.

c. Do you think that the HONC scores were approximately normal for each gender? Why or why not? How does this affect the validity of the analysis in part b?

a. Find a standard error for comparing the sample means. Interpret.

b. Find the test statistic and P-value for H0: μ1 = μ2 against Ha: μ1 ≠ μ2. Interpret, and explain what (if any) effect gender has on the mean HONC score.

c. Do you think that the HONC scores were approximately normal for each gender? Why or why not? How does this affect the validity of the analysis in part b?

## Answer to relevant Questions

Refer to the previous exercise. A subject was called a monthly smoker if he or she had smoked cigarettes over an extended period of time. The 74 female monthly smokers had a mean HONC score of 5.4 (s = 3.5), and the 71 male ...Refer to the data in the previous exercise. a. Show all steps of a two-sided significance test of the null hypothesis that the population mean is equal for the two groups. Interpret results in context. b. Based on the ...A clinical psychologist wants to choose between two therapies for treating severe cases of mental depression. She selects six patients who are similar in their depressive symptoms and in their overall quality of health. She ...Childhood obesity continues to be a leading public health concern that disproportionately affects low-income and minority children. According to the National Center for Health Statistics, obesity prevalence among low-income, ...Refer to the previous exercise. Suppose that the change in weight scores for the 132 freshmen had a standard deviation of 2.0 pounds. a. Explain how this standard deviation could be so much less than the standard deviation ...Post your question