A migraine is a particularly painful type of headache, which patients sometimes wish to treat withacupuncture. To determine whether acupuncture relieves migraine pain, researchers conducted a randomizedcontrolled study where 89 females diagnosed with migraine headaches were randomly assigned to one of twogroups: treatment or control. 43 patients in the treatment group received acupuncture that is specificallydesigned to treat migraines. 46 patients in the control group received placebo acupuncture (needle insertionat non-acupoint locations). 24 hours after patients received acupuncture, they were asked if they were painfree. Results are summarized in the contingency table below (Allais, 2011).(round answers to 2 decimal places)Pain Free: YesPain Free: NoTotalTreatment103343Control4446Total127789a) What percent of patients in the treatment group were pain free 24 hours after receiving acupuncture?b) What percent of patients in the control group were pain free after 24 hours?c) At first glance, does acupuncture appear to be an effective treatment for migraines? Explain yourreasoning.O yes, because more individuals in the treatment group were pain-free after 24 hoursno, because more than half of the individuals in the treatment group still experience pain 24 hours laterno, because there were fewer people in the treatment groupO yes, because a higher percentage of individuals in the treatment group were pain-free after 24 hoursd) Do the data provide convincing evidence that there is a real pain reduction for those patients in thetreatment group? Or do you think that the observed difference might just be due to chance?Yes, 23% is much higher than 4%OIt is impossible to tell merely by comparing the sample proportions because the difference could be theresult of random error in our sample

Name: A migraine is a particularly painful type of headache, which patients
Uploaded: 2024-03-20T07:07:00.000Z
Channel: Bartleby
Description: A migraine is a particularly painful type of headache, which patients sometimes wish to treat withacupuncture. To determine whether acupuncture relieves migraine pain, researchers conducted a randomizedcontrolled study where 89 females diagnosed wit

Math

Statistics

A migraine is a particularly painful type of headache, which patients sometimes wish to treat with acupuncture. To determine whether acupuncture relieves migraine pain, researchers conducted a randomized controlled study where 89 females diagnosed with migraine headaches were randomly assigned to one of two groups: treatment or control. 43 patients in the treatment group received acupuncture that is specifically designed to treat migraines. 46 patients in the control group received placebo acupuncture (needle insertion at non-acupoint locations). 24 hours after patients received acupuncture, they were asked if they were pain free. Results are summarized in the contingency table below (Allais, 2011). (round answers to 2 decimal places) Pain Free: Yes Pain Free: No Total

A migraine is a particularly painful type of headache, which patients sometimes wish to treat with acupuncture. To determine whether acupuncture relieves migraine pain, researchers conducted a randomized controlled study where 89 females diagnosed with migraine headaches were randomly assigned to one of two groups: treatment or control. 43 patients in the treatment group received acupuncture that is specifically designed to treat migraines. 46 patients in the control group received placebo acupuncture (needle insertion at non-acupoint locations). 24 hours after patients received acupuncture, they were asked if they were pain free. Results are summarized in the contingency table below (Allais, 2011). (round answers to 2 decimal places) Pain Free: Yes Pain Free: No Total

Holt Mcdougal Larson Pre-algebra: Student Edition 2012

1st Edition

ISBN:9780547587776

Author:HOLT MCDOUGAL

Publisher:HOLT MCDOUGAL

Chapter11: Data Analysis And Probability

Section: Chapter Questions

Problem 8CR

See similar textbooks

Similar questions

What is meant by the sample space of an experiment?
In 2010, a medical research group reported the results of an experiment to evaluate the effectiveness of acupuncture to treat a chronic intestinal condition. A group of volunteers with the chronic intestinal condition agreed to participate in the experiment and be randomly assigned to either a true acupuncture treatment or a placebo treatment. The placebo treatment mimicked the application of acupuncture, but no needle penetrated the skin. Random assignment resulted in 78 subjects receiving acupuncture and 75 subjects receiving the placebo treatment. After receiving 6 treatments over the course of 3 weeks, patients were asked to report whether they had experienced a reduction in the chronic intestinal condition. The table summarizes the data from the study, with expected cell counts in parentheses. Yes No Total Acupuncture 41 (37.2) 37 (40.8) 78 Placebo treatment 32 (35.8) 43 (39.2) 75 Total 73 80 153 Which of the following is true about the chi-square test for…
In randomized, double-blind clinical trials of a new vaccine, infants were randomly divided into two groups. Subjects in group 1 received the new vaccine while subjects in group 2 received a control vaccine. After the second dose, 126 of 387 subjects in the experimental group (group 1) experienced drowsiness as a side effect. After the second dose, 158 of 574 of the subjects in the control group (group 2) experienced drowsiness as a side effect. Does the evidence suggest that a higher proportion of subjects in group 1 experienced drowsiness as a side effect than subjects in group 2 at the α=0.01 level of significance? Verify the model requirements. Select all that apply. A. The sample size is less than 5% of the population size for each sample. B. n1p11−p1≥10 and n2p21−p2≥10 C. The samples are dependent. D. The sample size is more than 5% of the population size for each sample. E. The samples are independent. F. The data come…
A study published in 2007 by Christopher Johnson, professor of music education and music therapy at the University of Kansas, revealed that students in elementary schools who took private music lessons scored around 20 percent higher in math scores on standardized tests, compared to students who did not take private music lessons. Is this a randomized experiment or an observational study? a) Randomized experiment, since researchers gave students standardized tests. b) Observational study, since whether the student took private music lessons was not randomly assigned. c) Observational study, since math scores were not randomly assigned. d) Observational study, since this was not a random sample.
In randomized, double-blind clinical trials of a new vaccine, rats were randomly divided into two groups. Subjects in group 1 received the new vaccine while subjects in group 2 received a control vaccine. After the second dose, 111 of 670 subjects in the experimental group (group 1) experienced drowsiness as a side effect. After the second dose, 68 of 551 of the subjects in the control group (group 2) experienced drowsiness as a side effect. Does the evidence suggest that a higher proportion of subjects in group 1 experienced drowsiness as a side effect than subjects in group 2 at the α=0.05 level of significance? a. Find the test statistic for this hypothesis test. Round to two decimal places as needed.
A migraine is a particularly painful type of headache, which patients sometimes wish to treat with acupuncture. To determine whether acupuncture relieves migraine pain, researchers conducted a randomized controlled study where 89 females diagnosed with migraine headaches were randomly assigned to one of two groups: treatment or control. 43 patients in the treatment group received acupuncture that is specifically designed to treat migraines. 46 patients in the control group received placebo acupuncture (needle insertion at non-acupoint locations). 24 hours after patients received acupuncture, they were asked if they were pain free. Results are summarized in the contingency table below (Allais, 2011).(round answers to 2 decimal places) Pain Free: Yes Pain Free: No Total Treatment 10 33 43 Control 2 44 46 Total 12 77 89 a) What percent of patients in the treatment group were pain free 24 hours after receiving acupuncture? %b) What percent of patients in the control…
A migraine is a particularly painful type of headache, which patients sometimes wish to treat with acupuncture. To determine whether acupuncture relieves migraine pain, researchers conducted a randomized controlled study where 89 females diagnosed with migraine headaches were randomly assigned to one of two groups: treatment or control. 43 patients in the treatment group received acupuncture that is specifically designed to treat migraines. 46 patients in the control group received placebo acupuncture (needle insertion at non-acupoint locations). 24 hours after patients received acupuncture, they were asked if they were pain free. Results are summarized in the contingency table below (Allais, 2011).(round answers to 2 decimal places) Pain Free: Yes Pain Free: No Total Treatment 10 33 43 Control 2 44 46 Total 12 77 89 a) What percent of patients in the treatment group were pain free 24 hours after receiving acupuncture? %b) What percent of patients in the control…
Does being part of a support group aﬀect the ability of people to quit smoking? A county health department enrolled 300 smokers in a randomized experiment. 150 participants were assigned to a group that used a nicotine patch and met weekly with a support group; the other 150 received the patch and did not meet with a support group. At the end of the study, 40 of the participants in the patch plus support group had quit smoking while only 30 smokers had quit in the other group. (a) Create a two-way table presenting the results of this study. (b) Answer each of the following questions under the null hypothesis that being part of a support group does not aﬀect the ability of people to quit smoking, and indicate whether the expected values are higher or lower than the observed values. i. How many subjects in the “patch + support” group would you expect to quit? ii. How many subjects in the “patch only” group would you expect to not quit?
A migraine is a particularly painful type of headache, which patients sometimes wish to treat with acupuncture. To determine whether acupuncture relieves migraine pain, researchers conducted a randomized controlled study where 98 females diagnosed with migraine headaches were randomly assigned to one of two groups: treatment or control. 45 patients in the treatment group received acupuncture that is specifically designed to treat migraines. 53 patients in the control group received placebo acupuncture (needle insertion at non-acupoint locations). 24 hours after patients received acupuncture, they were asked if they were pain free. Results are summarized in the contingency table below.(please round answers to within one hundredth of a percent) Pain Free: Yes Pain Free: No Total Treatment 13 32 45 Control 4 49 53 Total 17 81 98 a) What percent of patients in the treatment group were pain free 24 hours after receiving acupuncture? %b) What percent of patients in the…
An article from the American Journal of Public Health reports the results from a randomized study designed to evaluate the efficacy of an intervention targeted to Hispanic/Latino men who identify as gay, bi-sexual or other men who have sex with men (MSM). A representative sample of 254 such men was randomized to be in either the intervention group (n=152, with 141 ultimately participating in the study) or the control group (n=152, with 147 ulitmately participating in the study). The primary outcome under study getting tested for HIV within the six-months following group assignment (randomization) among those who had been sexually active in this same six-month follow-up period. At six months of follow-up, 141 subjects in the intervention group reported having had sex (with men and/or women) since randomization. Of these 141 men, 114 had been tested for HIV since being randomized. At six months of follow-up, 147 subjects in the control group reported having had sex (with men…
Does being part of a support group affect the ability of people to quit smoking? A county health department enrolled 300 smokers in a randomized experiment. 150 participants were assigned to a group that used a nicotine patch and met weekly with a support group; the other 150 received the patch and did not meet with a support group. At the end of the study, 40 of the participants in the patch plus support group had quit smoking while only 30 smokers had quit in the other group. Answer each of the following questions under the null hypothesis that being part of a support group does not affect the ability of people to quit smoking, and think about whether the expected values are higher or lower than the observed values.a) How many subjects in the "patch + support" group would you expect to quit?b) How many subjects in the "patch only" group would you expect to not quit?
High levels of cholesterol in the blood are associated with higher risk of heart attacks. Will using a drug to lower blood cholesterol reduce heart attacks? The Helsinki Heart Study recruited middle-aged men with high cholesterol but no history of other serious medical problems to investigate this question. The volunteer subjects were assigned at random to one of two treatments: 2051 men took the drug gemfibrozil to reduce their cholesterol levels, and a control group of 2030 men took a placebo. During the next five years, 56 men in the gemfibrozil group and 84 men in the placebo group had heart attacks. Is the apparent benefit of gemfibrozil statistically significant? State the Null and Alternative Hypotheses. Make sure to define your parameters.