1. A) A pharmaceutical company is testing their new nicotine patch. Of 120 volunteers randomly assigned...
1.
A) A pharmaceutical company is testing their new nicotine patch. Of 120 volunteers randomly assigned to use the patch , 55 had to quit smoking after 8 weeks. Compute the 95% confidence interval to estimate the proportion of people who will quit smoking after 8 weeks. Interpret this confidence interval.
B) The pharmaceutical company repeats their test this time randomly assigning 130 volunteers to use the patch and finding that 61 had quit smoking after 8 weeks. Compute the 99.5% confidence interval to estimate the proportion of people who will quit smoking after 8 weeks. Does this support the company's claim that 60% of people quit smoking after 8 weeks of using the patch?
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1.
A) A pharmaceutical company is testing their new nicotine patch.
Of 120 volunteers randomly assigned...
Dr. Richard Hurt and his colleagues ( Hurt et al., 1994) randomly assigned volunteers wanting to quit smoking...
Dr. Richard Hurt and his colleagues ( Hurt et al., 1994) randomly assigned volunteers wanting to quit smoking to wear either a nicotine patch or a placebo patch to determine whether wearing a nicotine patch improves the chance of quitting. After 8 weeks of use, 46% of those wearing the nicotine patch but only 20% of those wearing the placebo patch had quit smoking. Was this a randomized experiment or an observational study? The difference in the percentage of participants who quit...
(b) In a study of 120 volunteers who were given nicotine patches, 58 had quit smoking....
(b) In a study of 120 volunteers who were given nicotine patches, 58 had quit smoking. (i) Construct a 95% confidence interval for p. 1 - a= a = a/2= 20/2= X1 (use at least 4 decimal places for ), ĝ=1 - Ộ = confidence interval for p: Ô Izovo
Nicotine patches are often used to help smokers quit. Does adding antidepressants to the nicotine patches...
Nicotine patches are often used to help smokers quit. Does adding antidepressants to the nicotine patches help? A randomized double-blind experiment assigned 250 to receive a patch that includes the antidepression drug bupropion and 232 smokers who wanted to stop to receive regular nicotine patches. After a year, 95 in the patch & drug group had abstained from smoking and 49 subjects in the nicotine patch group. p̂patch & drug = ________ p̂patch = ________ Find a 90% confidence interval for...
Suppose that 905 smokers each received a nicotine patch, which delivers nicotine to the bloodstream at...
Suppose that 905 smokers each
received a nicotine patch, which delivers nicotine to the
bloodstream at a much slower rate than cigarettes do. Dosage was
decreased to 0 over a 12 week period. Of these 905 people, 255 were
still not smoking 6 months after treatment. Assume this sample is
representative of all smokers.
Suppose that 905 smokers each received a nicotine patch, which delivers nicotine to the bloodstream at a much slower rate than cigarettes do. Dosage was decreased...
You work for a pharmaceutical company that is testing a new cholesterol drug. The proportion of...
You work for a pharmaceutical company that is testing a new cholesterol drug. The proportion of patients on the previous drug who had a positive treatment was 0.375. You want to see if the new drug is more effective than the previous drug. You conduct a sample of 113 patients on the new drug and find that 76 have had a positive treatment effect. The 95% confidence interval is ( 0.586 , 0.7591 ). What is the best conclusion you...
Part A: Suppose you work for a pharmaceutical company that is testing a new drug to...
Part A: Suppose you work for a pharmaceutical company that is testing a new drug to treat ulcerative colitis. You conduct a random sample of 34 patients on the new drug and 14 of them indicated a decrease in symptoms since starting the drug regimen. You construct a 90% confidence interval for this proportion to be ( 0.2733 , 0.5502 ). What is the correct interpretation of this confidence interval? 1) We are certain that 90% of patients will be...
8) A social psychologist studying sources of knowledge randomly assigned 82 volunteers to one of two...
8) A social psychologist studying sources of knowledge randomly assigned 82 volunteers to one of two experimental groups. 61 were instructed to get their news for a month only from television, and 21 were instructed to get their news for a month only from the Internet. After the month was up, all participants were tested on their knowledge of several political issues. The researcher did not have a prediction as to which news source would make people more knowledgeable. These...
As part of a research program for a new cholesterol drug, a pharmaceutical company would like...
As part of a research program for a new cholesterol drug, a pharmaceutical company would like to investigate the relationship between the ages and LDL (low-density lipoprotein) cholesterol of men. The following data set shows the ages and LDL cholesterol levels of seven randomly selected men. Construct a 95% confidence interval to estimate the average LDL cholesterol level of a 31-year-old man. Click the icon to view the datatable Determine the upper and lower limits of the confidence interval UCL-...
NCBM 0142 Day 18 Ch. 5 page 1 of 1 In Chapter 5, we learned these...
NCBM 0142 Day 18 Ch. 5 page 1 of 1 In Chapter 5, we learned these two general formulas: 3 General Confidence interval Sample Statistie SE Test Statistic Sample Sunse-Nollar 1. Incentives for Quitting Smoking: Do They Work? Exercise 5,31 describes a study examining incentives to quit smoking. With NO incentives, the proportion of smokers trying to quit who are still abstaining six months later is about 0.06. Participants in the study were randomly assigned to one of four different...
all answers please!! 1. A company that produces brendis concerned about the distribution of the amount of sodiu...
all answers please!!
1. A company that produces brendis concerned about the distribution of the amount of sodium in its bread. The company takes a simple random sample of 100 slices of bread and compute the sample mean to be 103 milligrams of sodium per slice. Assume that the population standard deviation is 10 milligrams a) Construct a 95% confidence interval estimate for the mean sedium level. b) Construct a 99% confidence intervalestime for the mean sodium level. 2. Fill...
(b) In a study of 120 volunteers who were given nicotine patches, 58 had quit smoking. (i) Construct a 95% confidence interval for p. 1 - a= a = a/2= 20/2= X1 (use at least 4 decimal places for ), ĝ=1 - Ộ = confidence interval for p: Ô Izovo
Suppose that 905 smokers each
received a nicotine patch, which delivers nicotine to the
bloodstream at a much slower rate than cigarettes do. Dosage was
decreased to 0 over a 12 week period. Of these 905 people, 255 were
still not smoking 6 months after treatment. Assume this sample is
representative of all smokers.
Suppose that 905 smokers each received a nicotine patch, which delivers nicotine to the bloodstream at a much slower rate than cigarettes do. Dosage was decreased...
As part of a research program for a new cholesterol drug, a pharmaceutical company would like to investigate the relationship between the ages and LDL (low-density lipoprotein) cholesterol of men. The following data set shows the ages and LDL cholesterol levels of seven randomly selected men. Construct a 95% confidence interval to estimate the average LDL cholesterol level of a 31-year-old man. Click the icon to view the datatable Determine the upper and lower limits of the confidence interval UCL-...
NCBM 0142 Day 18 Ch. 5 page 1 of 1 In Chapter 5, we learned these two general formulas: 3 General Confidence interval Sample Statistie SE Test Statistic Sample Sunse-Nollar 1. Incentives for Quitting Smoking: Do They Work? Exercise 5,31 describes a study examining incentives to quit smoking. With NO incentives, the proportion of smokers trying to quit who are still abstaining six months later is about 0.06. Participants in the study were randomly assigned to one of four different...
all answers please!!
1. A company that produces brendis concerned about the distribution of the amount of sodium in its bread. The company takes a simple random sample of 100 slices of bread and compute the sample mean to be 103 milligrams of sodium per slice. Assume that the population standard deviation is 10 milligrams a) Construct a 95% confidence interval estimate for the mean sedium level. b) Construct a 99% confidence intervalestime for the mean sodium level. 2. Fill...
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