Case-Only Design
Analytical studies are designed to test the hypotheses created by descriptive studies and to assess the cause–effect association. These studies are able to measure the effect of a specific exposure on the occurrence of an outcome over time. Depending on the nature of the exposure, whether it has been caused experimentally as an intervention on the study subjects or has happened naturally, without any specific intervention on the subjects, these studies may be divided into two major groups: observational and experimental studies. Each of these designs has its own advantages and disadvantages. In observational studies, by definition, the researcher is looking for causes, predictors, and risk factors by observing the phenomenon without doing any intervention on the subjects, whereas in experimental designs, there is an ...
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Reader's Guide
Descriptive Statistics
Distributions
Graphical Displays of Data
Hypothesis Testing
Important Publications
Inferential Statistics
Item Response Theory
Mathematical Concepts
Measurement Concepts
Organizations
Publishing
Qualitative Research
Reliability of Scores
Research Design Concepts
Research Designs
Research Ethics
Research Process
Research Validity Issues
Sampling
Scaling
Software Applications
Statistical Assumptions
Statistical Concepts
Statistical Procedures
Statistical Tests
Theories, Laws, and Principles
Types of Variables
Validity of Scores
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