Proportions Test Calculator

The Proportions Test Calculator is a statistical tool used to compare proportions between one or two groups and determine if the difference is statistically significant. This is particularly useful in A/B testing, medical research, election polling, and quality control studies. The calculator supports one-sample and two-sample Z-tests for proportions.

Key Features

One-Sample & Two-Sample Proportion Tests – Analyze a single proportion or compare two independent groups.
Customizable Confidence Levels – Choose from 90%, 95%, or 99% confidence intervals.
Z-Test Calculation – Computes the Z-score and p-value to determine statistical significance.
Graphical Visualization – Displays confidence intervals, proportion distributions, and comparative bar charts.
PDF Report Generation – Export results, statistical interpretations, and visual insights.

Use Cases

A/B Testing & Marketing Analytics – Compare conversion rates, click-through rates, or survey responses.
Medical & Clinical Research – Analyze the effectiveness of a new treatment vs. a placebo.
Election Polling & Social Research – Compare approval ratings or voting preferences between groups.
Quality Control & Manufacturing – Assess defect rates across different production batches.

How It Works

Input Data – Enter sample sizes and success counts for one or two groups.
Select Test Type – Choose between one-sample or two-sample Z-test for proportions.
Run Proportions Test – The tool calculates the Z-statistic, p-value, and confidence interval.
Interpret Results – Determine if the proportion difference is statistically significant.
Visualize & Export – View proportion comparison graphs and download a detailed PDF report.

This tool simplifies proportion analysis, making it essential for researchers, marketers, and data-driven professionals.