Homework Answers
In randomized controlled trial of a drug ...
"Controlled" means that the drug is compared to a placebo or standard treatment .
that is , The trial uses a control group for comparison or reference . In the control group , the participants do not receive the new
treatment but instead a placebo or reference treatment .
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Question 8 1 pts In a randomized controlled trial of a drug... O "Controlled" means that...
Question 5 3 pts The following data concerns a randomized controlled trial. Two groups of 100...
Question 5 3 pts The following data concerns a randomized controlled trial. Two groups of 100 men with systolic blood pressure in the 120 to 130 range and diastolic blood pressure in the 80 to 90 range are treated to reduce the “pre-hypertensive” state. The men are in the age range 30 to 40 years. The control group 1 is given placebo and the experimental group 2 is given a treatment.to reduce blood pressure. Assume the standard deviations are equal...
Question 5 3 pts The following data concerns a randomized controlled trial. Two groups of 100...
Question 5 3 pts The following data concerns a randomized controlled trial. Two groups of 100 men with systolic blood pressure in the 120 to 130 range and diastolic blood pressure in the 80 to 90 range are treated to reduce the “pre-hypertensive” state. The men are in the age range 30 to 40 years. The control group 1 is given placebo and the experimental group 2 is given a treatment.to reduce blood pressure. Assume the standard deviations are equal...
Question 6 4 pts The following data concerns a randomized controlled trial. Two groups of 100...
Question 6 4 pts The following data concerns a randomized controlled trial. Two groups of 100 men with systolic blood pressure in the 120 to 130 range and diastolic blood pressure in the 80 to 90 range are treated to reduce the “pre-hypertensive” state. The men are in the age range 30 to 40 years. The control group 1 is given placebo and the experimental group 2 is given a treatment.to reduce blood pressure. Assume the standard deviations are equal...
When you conduct a randomized placebo-controlled clinical trial with new treatment group (A) compared with a...
When you conduct a randomized placebo-controlled clinical trial with new treatment group (A) compared with a placebo group (B), which of the following methods can achieve true randomization? A. Alternating the patients for the new treatment group and the placebo group, for example, ABABABAB B. Assigning young patients to the new treatment group and old patients to the placebo group C. Assigning patients in Clinic 1 to the new treatment group and patients in Clinic 2 to the placebo group...
Question 1 1 pts You conduct an experiment to see if a new drug is an...
Question 1 1 pts You conduct an experiment to see if a new drug is an effective treatment for an ailment. You split your sample of 20 people randomly into two groups. The "Drug" group receives the drug, and the "Placebo" group receives a placebo. The data shown below indicate the change in their health after the treatment Drug Placebo O dood - dob - H Calculate the t-statistic to test whether the difference between the population means is 0...
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...
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...
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...
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...
> Question 9 3 pts In a randomized, double-blind, placebo-controlled trial of children, echinacea was tested...
> Question 9 3 pts In a randomized, double-blind, placebo-controlled trial of children, echinacea was tested as a treatment for upper respiratory infections in children. "Days of fever" was one criterion used to measure effects. Among 337 children treated with echinacea, the mean number of days with fever was 0.81, with a standard deviation of 1.50 days. Among 370 children given a placebo, the mean number of days with fever was 0.64 with a standard deviation of 1.16 days. Assuming...
Question 5 3 pts The following data concerns a randomized controlled trial. Two groups of 100 men with systolic blood pressure in the 120 to 130 range and diastolic blood pressure in the 80 to 90 range are treated to reduce the “pre-hypertensive” state. The men are in the age range 30 to 40 years. The control group 1 is given placebo and the experimental group 2 is given a treatment.to reduce blood pressure. Assume the standard deviations are equal...
Question 5 3 pts The following data concerns a randomized controlled trial. Two groups of 100 men with systolic blood pressure in the 120 to 130 range and diastolic blood pressure in the 80 to 90 range are treated to reduce the “pre-hypertensive” state. The men are in the age range 30 to 40 years. The control group 1 is given placebo and the experimental group 2 is given a treatment.to reduce blood pressure. Assume the standard deviations are equal...
Question 6 4 pts The following data concerns a randomized controlled trial. Two groups of 100 men with systolic blood pressure in the 120 to 130 range and diastolic blood pressure in the 80 to 90 range are treated to reduce the “pre-hypertensive” state. The men are in the age range 30 to 40 years. The control group 1 is given placebo and the experimental group 2 is given a treatment.to reduce blood pressure. Assume the standard deviations are equal...
Question 1 1 pts You conduct an experiment to see if a new drug is an effective treatment for an ailment. You split your sample of 20 people randomly into two groups. The "Drug" group receives the drug, and the "Placebo" group receives a placebo. The data shown below indicate the change in their health after the treatment Drug Placebo O dood - dob - H Calculate the t-statistic to test whether the difference between the population means is 0...
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...
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...
> Question 9 3 pts In a randomized, double-blind, placebo-controlled trial of children, echinacea was tested as a treatment for upper respiratory infections in children. "Days of fever" was one criterion used to measure effects. Among 337 children treated with echinacea, the mean number of days with fever was 0.81, with a standard deviation of 1.50 days. Among 370 children given a placebo, the mean number of days with fever was 0.64 with a standard deviation of 1.16 days. Assuming...
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