Question
Subjects were randomly assigned to two groups, and one group was given an herb and the other a placebo. After 6 months, the numbers of
Subjects were randomly assigned to two groups, and one group was given an herb and the other a placebo. After 6 months, the numbers of respiratory tract infections each group had were compared.
Questions:
a) Is this study experimental or observational? Explain your answer.
b) Identify the independent variable.
c) Identify the dependent variable.
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Essentials Of College Algebra
Authors: Margaret L Lial, John E Hornsby, David I Schneider, Teresa McGinnis
10th Edition
0321970632, 9780321970633
