40+ free tools for surveys, polls, and statistical analysis
Mean, median, mode, std dev, variance, quartiles
Calculate any percentile rank
Standardize values & find percentiles
Generate comprehensive data summaries
Calculate required sample size
Calculate confidence interval margins
Estimate population parameters
Sample size for proportions
One-sample and two-sample t-tests
Test independence & goodness of fit
Compare multiple group means
Test population proportions
Pearson & Spearman correlation
Simple linear regression analysis
Non-parametric two-group comparison
Non-parametric ANOVA alternative
Create instant polls with results
Analyze 1-5 scale survey responses
Net Promoter Score calculator
Generate stratified random samples
Evaluate survey question quality
Analyze demographic distributions