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Sample size
Educational articles on statistical methods, SPSS usage, and academic research.
Sample Size
Determining Sample Size in Prevalence Studies
Prevalence refers to the frequency with which a disease or event occurs in a population. It is usually obtained from cross-sectional studies.
4/14/2026
10 min
Sample Size
Sample Size for Correlation Coefficient (Relationship)
It is used to examine the relationship between clinical variables and scales, and between clinical variables and measurements such as age and operation duration.
4/14/2026
10 min