Question

n 1990, the average student at a large university in the south smokes 8.3 cigarettes per day. Due to recent efforts and policy implementations related to smoking, a director of the student health center wishes to determine whether the incidence of cigarette smoking has decreased. She selects 30 students randomly and found a mean of 7.6 with a standard deviation of 1. Use the .10 level of significance to answer the research question.

Null and Alternative Hypothesis - H₀: ?>8.3; H₁: ?<8.3

Test Statistic -3.83

Critical Value -1.31

4. What decision should be made about the null hypothesis?

	a.	There is insufficient evidence to indicate that the alternative hypothesis is true.
	b.	Reject the alternative hypothesis
	c.	Reject the null hypothesis b/c |t|>|t*|
	d.	reject the null hypothesis

In 1990, the average student at a large university in the south smokes 8.3 cigarettes per day. Due to recent efforts and policy implementations related to smoking, a director of the student health center wishes to determine whether the incidence of cigarette smoking has decreased. She selects 30 students randomly and found a mean of 7.6 with a standard deviation of 1. Use the .10 level of significance to answer the research question.

4. What decision should be made about the null hypothesis?

	a.	There is insufficient evidence to indicate that the alternative hypothesis is true.
	b.	Reject the alternative hypothesis
	c.	Reject the null hypothesis b/c |t|>|t*|
	d.	reject the null hypothesis

6. What final conclusion can be made within the context of this example?

	a.	There is insufficient evidence to indicate that cigarette smoking has decreased.
	b.	There is sufficient evidence to indicate that cigarette smoking has decreased.
	c.	Because |t|>|t*|, there is sufficient evidence to indicate that cigarette smoking has decreased.
	d.	There is sufficient evidence to indicate that cigarette smoking has not changed.

Answer 1

4) Option - c

6) Option - c