Question

A study examined parental influence on​ teenagers' decisions to smoke. A group of students who had...

A study examined parental influence on​ teenagers' decisions to smoke. A group of students who had never smoked were questioned about their​ parents' attitudes toward smoking. These students were questioned again two years later to see if they had started smoking. The researchers found​ that, among the 273 students who indicated that their parents disapproved of kids​ smoking, 71 had become established smokers. Among the 35 students who initially said their parents were lenient about​ smoking, 15 became smokers. Do these data provide strong evidence that parental attitude influences​ teenagers' decisions about​ smoking? Complete parts a through f.

​a) What kind of design did the researchers​ use?

An experiment

A retrospective observational study

A prospective observational study

​b) Write the appropriate hypotheses. Let p1 be the proportion of teenagers whose parents had indicated disapproval of smoking for them who became smokers themselves. Let p2 be the proportion of teenagers whose parents had expressed leniency toward smoking for them who became smokers themselves. Choose the correct answer below.

A. H0​: p1minusp2not equals0 HA​: p1minusp2equals0

B. H0​: p1minusp2greater than0 HA​: p1minusp2equals0

C. H0​: p1minusp2equals0 HA​: p1minusp2not equals0

D. H0​: p1minusp2equals0 HA​: p1minusp2greater than0

​c) Are the assumptions and conditions necessary for inference​ satisfied?

A. ​Yes, all of the assumptions and conditions are satisfied.

B. ​No, because the randomization condition is not satisfied.

C. ​No, because the​ success/failure condition is not satisfied.

D. ​No, because the​ 10% condition is not satisfied.

E. ​No, because the independent groups assumption is not satisfied.

​d) Test the hypothesis and state your conclusion. Determine the test statistic. z=? nothing ​(Round to two decimal places as​ needed.) Find the​ P-value. P=? nothing ​(Round to four decimal places as​ needed.)

State your conclusion. Use a significance level of alphaequals0.05. Choose the correct answer below.

A. Do not reject the null hypothesis. There is sufficient evidence that parental attitude influences​ teenagers' decisions about smoking.

B. Reject the null hypothesis. There is sufficient evidence that parental attitude influences​ teenagers' decisions about smoking.

C. Reject the null hypothesis. There is not sufficient evidence that parental attitude influences​ teenagers' decisions about smoking.

D. Do not reject the null hypothesis. There is not sufficient evidence that parental attitude influences​ teenagers' decisions about smoking.

Homework Answers

Answer #1

(a) A prospective observational study.
(c) ​Yes, all of the assumptions and conditions are satisfied.
(d) State your conclusion. Reject the null hypothesis. There is sufficient evidence that parental attitude influences​ teenagers' decisions about smoking.

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
A Vermont study published by the American Academy of Pediatrics examined parental influence on teenagers' decisions...
A Vermont study published by the American Academy of Pediatrics examined parental influence on teenagers' decisions to smoke. A group of students who had never smoked were questioned about their parents' attitudes toward smoking. These students were questioned again two years later to see if they had started smoking. The researchers found that, among the 284 students (we call group A) who had indicated that their parents disapproved of kids smoking, 54 had become established smokers. Among the 41 students...
In one study of smokers who tried to quit smoking with nicotine patch​ therapy, 39 were...
In one study of smokers who tried to quit smoking with nicotine patch​ therapy, 39 were smoking one year after treatment and 32 were not smoking one year after the treatment. Use a 0.10 significance level to test the claim that among smokers who try to quit with nicotine patch​ therapy, the majority are smoking one year after the treatment. Do these results suggest that the nicotine patch therapy is not​ effective? Identify the null and alternative hypotheses for this...
Suppose a group of 700 smokers (who all wanted to give up smoking) were randomly assigned...
Suppose a group of 700 smokers (who all wanted to give up smoking) were randomly assigned to receive an antidepressant drug or a placebo for six weeks. Of the 195 patients who received the antidepressant drug, 90 were not smoking one year later. Of the 505 patients who received the placebo, 170 were not smoking one year later. Given the null hypothesis H0:(pdrug−pplacebo)=0 and the alternative hypothesis Ha:(pdrug−pplacebo)≠0, conduct a test to see if taking an antidepressant drug can help...
Suppose a group of 800 smokers (who all wanted to give up smoking) were randomly assigned...
Suppose a group of 800 smokers (who all wanted to give up smoking) were randomly assigned to receive an antidepressant drug or a placebo for six weeks. Of the 543 patients who received the antidepressant drug, 221 were not smoking one year later. Of the 257 patients who received the placebo, 42 were not smoking one year later. Given the null hypothesis H0:(pdrug−pplacebo)=0 and the alternative hypothesis Ha:(pdrug−pplacebo)≠0, conduct a test to see if taking an antidepressant drug can help...
Suppose a group of 900 smokers (who all wanted to give up smoking) were randomly assigned...
Suppose a group of 900 smokers (who all wanted to give up smoking) were randomly assigned to receive an antidepressant drug or a placebo for six weeks. Of the 152 patients who received the antidepressant drug, 36 were not smoking one year later. Of the 748 patients who received the placebo, 189 were not smoking one year later. Given the null hypothesis H0:(pdrug−pplacebo)=0 and the alternative hypothesis Ha:(pdrug−pplacebo)≠0, conduct a test to see if taking an antidepressant drug can help...
Suppose a group of 900 smokers (who all wanted to give up smoking) were randomly assigned...
Suppose a group of 900 smokers (who all wanted to give up smoking) were randomly assigned to receive an antidepressant drug or a placebo for six weeks. Of the 360 patients who received the antidepressant drug, 140 were not smoking one year later. Of the 540 patients who received the placebo, 136 were not smoking one year later. Given the null hypothesis H0:(pdrug−pplacebo)=0 and the alternative hypothesis Ha:(pdrug−pplacebo)≠0 , conduct a test to see if taking an antidepressant drug can...
(1 point) Suppose a group of 700 smokers (who all wanted to give up smoking) were...
(1 point) Suppose a group of 700 smokers (who all wanted to give up smoking) were randomly assigned to receive an antidepressant drug or a placebo for six weeks. Of the 139 patients who received the antidepressant drug, 30 were not smoking one year later. Of the 561 patients who received the placebo, 107 were not smoking one year later. Given the null hypothesis H0:(pdrug−pplacebo)=0H0:(pdrug−pplacebo)=0 and the alternative hypothesis Ha:(pdrug−pplacebo)≠0Ha:(pdrug−pplacebo)≠0, conduct a test to see if taking an antidepressant drug...
A random sample of 37 second graders who participated in sports had manual dexterity scores with...
A random sample of 37 second graders who participated in sports had manual dexterity scores with mean 32.29 and standard deviation 4.14. An independent sample of 37 second graders who did not participate in sports had manual dexterity scores with mean 31.88 and standard deviation 4.86. (a) Test to see whether sufficient evidence exists to indicate that second graders who participate in sports have a higher mean dexterity score. Use α = 0.05. State the null and alternative hypotheses. (Us...
Suppose a group of 900 smokers (who all wanted to give up smoking) were randomly assigned...
Suppose a group of 900 smokers (who all wanted to give up smoking) were randomly assigned to receive an antidepressant drug or a placebo for six weeks. Of the 190 patients who received the antidepressant drug, 66 were not smoking one year later. Of the 710 patients who received the placebo, 322 were not smoking one year later. Given the null hypothesis H0:(pdrug−pplacebo)=0 H 0 : ( p d r u g − p p l a c e b...
Several years​ ago, 47​% of parents who had children in grades​ K-12 were satisfied with the...
Several years​ ago, 47​% of parents who had children in grades​ K-12 were satisfied with the quality of education the students receive. A recent poll asked 1,125 parents who have children in grades​ K-12 if they were satisfied with the quality of education the students receive. Of the 1,125 ​surveyed, 468 indicated that they were satisfied. Construct a 99​% confidence interval to assess whether this represents evidence that​ parents' attitudes toward the quality of education have changed. What are the...