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Epidemiological Calculator

• 1. Confidence Interval for a Mean
• 2. Confidence Interval for the Difference between two means
• 3. Confidence Interval for a Proportion
  
• 4. Confidence Interval for Odds Ratio, Risk Ratio
• 5. Pooled Prevalence Calculations
• 5 (a). Pooled Prevalence for fixed size and perfect test
• 5 (b). Pooled prevalence for fixed pool size and tests with Known Sensitivity and Specificity
  
• 5 (c). Pooled prevalence for fixed pool size and tests with Uncertain Sensitivity and Specificity
  
• 5 (d). Pooled prevalence for variable pool size and perfect tests
  
• 6. Simulated True Prevalence with an imperfect test
• 7. Estimated True Prevalence & Predictive Values
• 8. Sample Size Calculations
• 8(a). Herd (Cluster) Level Sample Size Estimation
• 8(b). Random and Stratified Sampling from a Sampling Frame and Sample size calculation
• 8(c). Sample size to estimate a proportion or apparent prevalence with specified precision
• 8(d). Sample size to estimate a single mean with specified precision
• 8(e). Sample size to detect a significant difference between 2 proportions
• 8(f). Sample size to detect a significant difference between 2 means with equal sample sizes and variances
• 8(g). Sample size to detect a significant difference between 2 means with unequal sample sizes and variances
• 8(h). Sample size to estimate a true prevalence with an imperfect test
• 8(i). Sample Size for testing One Mean ( Threshold ) for One Sample
• 8(j). Sample Size Estimation with correlation co-efficient
• 8(k). Sample Size Estimation with odds ratio
• 8(l). Sample Size Needed to Compare k Means: 1-Way ANOVA Pairwise, 2-Sided Equality