Significant difference calculator between proportions
Check if the observed difference between two samples is significant regarding a percentage or a proportion. For example, you have two online advertisements to engage users in your web, A and B. You show each advertisement to 1.000 people and A advertisement gets 10,5% of sales conversion and B gets 11%. How can you determine if this difference was by chance or advertisement A was really better? By doing a test of significance. You have more info in the following post.
To use the calculator:
- Enter the sample size and the observed % for the sample 1.
- Do the same with sample 2.
- Enter which confidence level you want in order to prove that the observed difference is not by chance. A larger confidence level requires a larger observed difference.
- ...so there it is! Result is re-calculated each time you modify the different parameters. The calculator evaluates if the difference is significant and which is the minimum difference you have to observe to get this significance.
Confidence level %
Confidence level over the significance you want to get
Is this difference significant?
The minimum difference to state with a confidence of 95% it is significant is: is: %