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In this session, we will investigate the idea of comparative studies — studies that focus on comparing several different distributions. The analysis and interpretation of data from comparative studies depend on the method of data collection, which can be either experimental or observational. See Note 1 below.
The goal of this session is to understand the concepts involved in comparing two or more groups. In this session, you will do the following:
• Investigate comparative studies, which can be experimental or observational
• Learn how to analyze and interpret results from comparative studies
• Learn how to design a comparative experiment
• Explore paired and unpaired comparative studies
Note 1
In this session, we are analyzing experimental results informally. More standard statistical methods use formal inference procedures to make generalizations from the results of experiments.
Previously Introduced:
bias
box plot
distribution
Five-Number Summary
interquartile range
mean
median
New in This Session:
comparative experimental study
comparative observational study
comparative study
design of a comparative study
random assignment
treatment