In a randomized, controlled trial, there was found to be statistically significant evidence of a reduction...
In a randomized, controlled trial, there was found to be statistically significant evidence of a reduction in myocardial infarction (heart attack) risk in participants who took aspirin. Participants who took aspirin had a 44% reduction in risk of heart attack as compared to their counterparts who received placebo (relative risk = 0.56; 95% confidence interval, 0.45 to 0.70). If you conducted a hypothesis test on the data, do you expect the p-value to be less than 0.05 or greater than 0.05? Explain.
Homework Answers
Since the null hypothesis is rejected, it is clear that P-value should be less than 0.05.
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In a randomized, controlled trial, there was found to be
statistically significant evidence of a reduction...
8. There is a statistically significant difference in height between twin boys and girls. True or...
8. There is a statistically significant difference in height between twin boys and girls. True or false? (1 point) Use the following information to answer questions 9-11 A randomized controlled trial is conducted to compare an experimental medication to placebo to reduce the symptoms of asthma. 400 participants are enrolled in the study and randomized to receive either the experimental medication or placebo. The primary outcome is self-reported reduction of symptoms. Among 210 participants who receive the experimental medication, 85...
A clinical trial is conducted to compare an experimental medication to placebo to reduce the symptoms...
A clinical trial is conducted to compare an experimental medication to placebo to reduce the symptoms of asthma. Two hundred participants are enrolled in the study and randomized to receive either the experimental medication or placebo. The primary outcome is self-reported reduction of symptoms. Among 100 participants who receive the experimental medication, 38 report a reduction of symptoms as compared to 21 participants of 100 assigned to placebo. When you test if there is a significant difference in the proportions...
A multicenter double-blind randomized study was carried out to compare the effect of drug X with...
A multicenter double-blind randomized study was carried out to compare the effect of drug X with that of a placebo in patients surviving acute myocardial infarction (AMI). Treatment with the drug started 7 days after infarction in 1,884 patients, 52% of all persons who were evaluated for entry into the study. 945 participants were randomized to treatment with drug X while 939 were assigned to the placebo group. Patients were then followed for 12 months for reinfarction. There were 152...
In a randomized controlled trial of screening for two forms of cancer (breast and colon), more...
In a randomized controlled trial of screening for two forms of cancer (breast and colon), more than 150,000 men and women were recruited to take part. Follow-up of these individuals took place over an average of 5 years for cancer incidence and cause-specific mortality. In an analysis unrelated to those bearing on the efficacy of screening, incidence and mortality rates in all trial participants combined were compared to those of demographically comparable individuals in the population as a whole. The...
True or False? A clinical trial is conducted to compare an experimental medication to placebo to...
True or False? A clinical trial is conducted to compare an experimental medication to placebo to reduce the symptoms of asthma. Two hundred participants are enrolled in the study and randomized to receive either the experimental medication or placebo. The primary outcome is self-reported reduction of symptoms. Among 50 participants who receive the experimental medication, 30 report a reduction of symptoms as compared to 15 participants of 50 assigned to the placebo. The 95% CI for the relative risk of...
Question 21 1 pt A clinical trial is conducted to compare an experimental medication to placebo to reduce the symptoms of asthma. Participants are randomized to receive either the experimental me...
Question 21 1 pt A clinical trial is conducted to compare an experimental medication to placebo to reduce the symptoms of asthma. Participants are randomized to receive either the experimental medication or placebo. The primary outcome is self-reported reduction of symptoms. Among 140 participants who received the experimental medication, 85 reported a reduction of symptoms as compared to 47 participants of 140 assigned to placebo we need to generate a 95% cont dence inter al for the diference in proportions...
A multicenter double-blind randomized study was carried out to compare the effect of drug X with that of a placebo in patients surviving acute myocardial infarction (AMI). Treatment with the drug star...
A multicenter double-blind randomized study was carried out to compare the effect of drug X with that of a placebo in patients surviving acute myocardial infarction (AMI). Treatment with the drug started 7 days after infarction in 1,884 patients, 52% of all persons who were evaluated for entry into the study. 945 participants were randomized to treatment with drug X while 939 were assigned to the placebo group. Patients were then followed for 12 months for reinfarction. There were 152...
6. (3 pts) A randomized clinical trial was conducted in Indonesia to study the effects of...
6. (3 pts) A randomized clinical trial was conducted in Indonesia to study the effects of Vitamin A in preventing deaths among children with measles. The investigators reported a relative risk of 0.60 for the intervention versus control group. This means that A) Children receiving Vitamin A were 40% less likely to die from measles than children receiving placebo, therefore Vitamin A was protective B) The chance of dying from measles in the placebo group was 60% C) 60% of...
0/1 points 1 Previous Answers Refer to the previous question describing the study of 22,0 each...
0/1 points 1 Previous Answers Refer to the previous question describing the study of 22,0 each of the following terms to its correct description 2. 71 male physicians who were randomly assigned to take either an aspirin or a placebo every other csample a. the 22,071 male physicians subject b. all US males aged 40 or older bpopulation c. a physician in the study 1. 11 points 1 Previous Answers My Notes Ask our The following study is a very...
A randomized controlled trial was conducted to compare time to relapse in risperidone-(GroupR) vs. Haloperidol-treated (Group...
A randomized controlled trial was conducted to compare time to relapse in risperidone-(GroupR) vs. Haloperidol-treated (Group H) schizophrenic patients discharged from the hospital. Relapse was defined as the first re-hospitalization within one year after discharge. Logrank test (also called Mantel-Cox test) was used to examine time(days) to relapse. Test result is shown in the table below. Level of significance alpha=.05. which of the following statement is an appropriate interpretation of the test result n Time to Relapse (days) Logrank p...
8. There is a statistically significant difference in height between twin boys and girls. True or false? (1 point) Use the following information to answer questions 9-11 A randomized controlled trial is conducted to compare an experimental medication to placebo to reduce the symptoms of asthma. 400 participants are enrolled in the study and randomized to receive either the experimental medication or placebo. The primary outcome is self-reported reduction of symptoms. Among 210 participants who receive the experimental medication, 85...
Question 21 1 pt A clinical trial is conducted to compare an experimental medication to placebo to reduce the symptoms of asthma. Participants are randomized to receive either the experimental medication or placebo. The primary outcome is self-reported reduction of symptoms. Among 140 participants who received the experimental medication, 85 reported a reduction of symptoms as compared to 47 participants of 140 assigned to placebo we need to generate a 95% cont dence inter al for the diference in proportions...
6. (3 pts) A randomized clinical trial was conducted in Indonesia to study the effects of Vitamin A in preventing deaths among children with measles. The investigators reported a relative risk of 0.60 for the intervention versus control group. This means that A) Children receiving Vitamin A were 40% less likely to die from measles than children receiving placebo, therefore Vitamin A was protective B) The chance of dying from measles in the placebo group was 60% C) 60% of...
0/1 points 1 Previous Answers Refer to the previous question describing the study of 22,0 each of the following terms to its correct description 2. 71 male physicians who were randomly assigned to take either an aspirin or a placebo every other csample a. the 22,071 male physicians subject b. all US males aged 40 or older bpopulation c. a physician in the study 1. 11 points 1 Previous Answers My Notes Ask our The following study is a very...
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