What is the Statistical Significance Calculator?

The Statistical Significance Calculator is a tool that helps users determine whether the difference between two sample proportions is statistically significant. By entering the sample proportions, their sizes, and a significance level (α), the calculator computes the combined proportion, z-score, p-value, and indicates whether the observed difference is significant. This is useful for experiments, surveys, A/B testing, or any situation where you need to compare proportions reliably.

How to Use:

1. Enter Sample 1 Proportion (p₁): Input the proportion of success or occurrence for the first sample (e.g., 0.45).
2. Enter Sample 1 Size (n₁): Input the total number of observations in the first sample.
3. Enter Sample 2 Proportion (p₂): Input the proportion of success or occurrence for the second sample (e.g., 0.55).
4. Enter Sample 2 Size (n₂): Input the total number of observations in the second sample.
5. Enter Significance Level (α): Input the significance threshold (default is 0.05).
6. Click “Calculate”: The calculator computes the combined proportion, z-score, p-value, and determines if the difference is statistically significant.
7. Review Result: Check the output to see all calculated values and whether the difference between samples is significant.