Question

In a random sample of 120 cigarette smokers who were assigned to use vaporizer, 34 reported...

In a random sample of 120 cigarette smokers who were assigned to use vaporizer, 34 reported that they quit smoking after 10 weeks.

a) Give a point estimate, ?′, for the proportion of cigarette smokers who quit smoking after 10 weeks of using vaporizer

b) Construct a 99% confidence interval for the point estimate you determined in part a.

Homework Answers

Answer #1

Solution :

Given that,

Point estimate = sample proportion = = x / n = 34 / 120 = 0.283

Z/2 = 2.576

Margin of error = E = Z / 2 * (( * (1 - )) / n)

= 2.576 * (((0.283 * 0.717) / 120)

= 0.106

A 99% confidence interval for population proportion p is ,

- E < p < + E

0.283 - 0.177 < p < 0.283 + 0.177

0.177 < p < 0.389

(0.177 , 0.389)

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
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 the treatment, and 32 were not smoking one year after the treatment (based on data from "High-Dose Nicotine Patch Theory," by Dale et al., Journal of the American Medical Association, Vol. 274, No.17). Provide a 99% confidence interval for the proportion of smokers who are smoking again one year after their treatment.
4. A woman who smokers during pregnancy increase health risks to the infant so that it...
4. A woman who smokers during pregnancy increase health risks to the infant so that it is known that about 20% (1/5) of female smokers quit smoking during pregnancy. Suppose that a random sample of 400 pregnant women who smoked prior to pregnancy contained 62 who quit smoking during pregnancy. a. What is the point estimator for p, the population of female smokers who quit smoking during pregnancy? b. What are the assumptions (requirements) for constructing a confidence interval for...
In one study of smokers who tried to quit smoking with nicotine patch therapy, 50 were...
In one study of smokers who tried to quit smoking with nicotine patch therapy, 50 were smoking one year after the treatment, and 34 were not smoking one year after the treatment. Use a 0.05 significance level to test the claim that among smokers who try to quit with nicotine patch therapy, the majority are smoking a year after treatment.
Another study was done with smokers to determine success rates of quitting. Of 567 smokers that...
Another study was done with smokers to determine success rates of quitting. Of 567 smokers that smoked for 10+ years and used gum to quit, 321 of them were still not smoking after 1 year. Of 631 smokers that smoked for 10+ years and used the patch to quit, 457 of them were still not smoking after 1 year. Calculate a 95% +4 confidence interval with your calculator to estimate the true difference proportion of smokers that successfully quit for...
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 34 were not smoking one year after the treatment. Use a 0.01 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? What is test statistic for this hypothesis test...
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 207 patients who received the antidepressant drug, 31 were not smoking one year later. Of the 493 patients who received the placebo, 123 were not smoking one year later. Given the null hypothesis ?0:(?????−????????)=0 and the alternative hypothesis ??:(?????−????????)≠0, conduct a test to see if taking an antidepressant drug can help...
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...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT