math statistics

posted by .

Marathon runners were randomly assigned to receive either vitamin C or a placebo.

Separately, these treatments were also randomly assigned to a group of nonrunners the same age as the runners. All subjects were watched for 2 weeks after the race to see if infections developed.

1. What is the name for this experimental design? I think it is either randomized comparative design or compeltely randomized design. Can you please explain and help me out? Thank you

• math statistics -

Could it be a block design?

Thank you

• math statistics -

Yes.

Similar Questions

1. Completely Randomized ANOVA

Forty eight subjects were randomly assigned to one of 4 treatment conditions in a study of different methods of coping with statistics exam anxiety. After the experiment, 12 subjects remained in group 1, 8 in group 2, 10 in group 3, …
2. Stats - Post Hoc Analysis

This is a question I am working on. i have successfully figured out part A and am having trouble with part B. (My work for Part B is shown below) ______________________________________ Two new therapies designed to increase levels …
3. AP Statistics

Of all U.S. fourth graders, 71% are assigned mathematics homework three or more times per week. If 5 fouth graders are randomly selected to be checked for this frequency of homework assignment during a randomly chosen week, find the …
4. Statistics

A Swedish study used 1360 patients who had suffered a stroke. The study randomly assigned 684 patients to receive a placebo treatment and the rest to receive an aspirin treatment. Out of those who received the placebo treatment, 28 …
5. math statistics

Marathon runners were randomly assigned to receive either vitamin C or a placebo. Separately, these treatments were also randomly assigned to a group of nonrunners the same age as the runners. All subjects were watched for 2 weeks …
6. Statistics

Given a study of 9804 overweight or obese subjects with preexisting cardiovascular disease and/or type 2 diabetes. Subjects randomly assigned to subitramine (4906 subjects) or a placebo (4898 subjects) in a double-blind fashion. Primary …
7. statistics

A study of 36 marathon runners showed that they could run at an average rate of 7.8 miles per hour. The sample standard deviation is 0.6. Find a point estimate of the population mean. Find the 90% confidence interval forthe mean of …
8. AP Statistics

A study sought to determine whether the ancient Chinese art of acupuncture could help infertile women become pregnant. 160 healthy women undergoing treatment for infertility were recruited for the study. Half of the subjects were randomly …
9. Statistics

The manufacturer of Sleepeze has asked you to test the effectiveness of the drug. You decide to test the effectiveness using the drug and a placebo. You select a select a group of 500 subjects and randomly assign them to either the …
10. Math

A total of 45 412 runners participated in the Vancouver Sun Run. Of these runners, 0.85% completed the run in under 40 min. How many runners completed in under 40 mins?

More Similar Questions

Post a New Question