Clarity32 FREE TOOLS
Statistics, made clearer.
Summarize datasets, compare distributions and explore probability with stated statistical conventions.
Tools in this category
Geometric Mean Calculator
Find the multiplicative average of strictly positive observations.
Harmonic Mean Calculator
Find an average suited to positive rates with equal numerators.
Root Mean Square Calculator
Find the square root of the average squared observation.
Population Variance Calculator
Find mean squared distance from the mean using denominator n.
Sample Variance Calculator
Estimate variance using Bessel’s correction for a sample.
Standard Error of the Mean Calculator
Estimate standard error from a sample standard deviation and sample size.
Coefficient of Variation Calculator
Find sample standard deviation relative to a positive mean.
Mean Absolute Deviation Calculator
Find average absolute distance from the arithmetic mean.
Median Absolute Deviation Calculator
Find the median absolute distance from the sample median.
Interquartile Range Calculator
Find the spread of the middle half of your data.
Percentile Calculator
Estimate a requested percentile of a numeric sample.
Percentile Rank Calculator
Find the percentage of observations at or below a selected value.
IQR Outlier Fences Calculator
Calculate Tukey’s lower and upper fences from the sample quartiles.
Trimmed Mean Calculator
Average data after removing equal counts from each sorted tail.
Mode Calculator
Find the most frequent exact numeric values in a dataset.
Normal Distribution Density Calculator
Evaluate the height of a normal probability density curve.
Normal Mean Confidence Interval Calculator
Find a mean interval using a supplied critical z value.
Proportion Margin of Error Calculator
Estimate normal-approximation margin of error for a proportion.
Proportion Sample Size Calculator
Estimate a sample size for a specified absolute proportion margin.
Finite Population Sample Adjustment Calculator
Adjust an initial sample size for a finite population.
Binomial Probability Calculator
Find the probability of exactly k successes in independent trials.
Binomial Mean and Variance Calculator
Find expected successes and variance for a binomial model.
Poisson Probability Calculator
Find the probability of exactly k events for a constant-rate Poisson model.
Geometric Probability Calculator
Find the probability that the first success occurs on a specified trial.
Exponential Survival Probability Calculator
Find probability that a waiting time exceeds a given duration.
Independent Events Intersection Calculator
Calculate the chance that two independent events both occur.
Probability of Either Event Calculator
Find the probability of A or B, including their overlap.
Conditional Probability Calculator
Find probability of A given B from joint and conditioning probabilities.
Bayes’ Theorem Calculator
Update a prior probability using two conditional likelihoods.
Discrete Expected Value Calculator
Find a weighted expected outcome from values and probabilities.
Pearson Correlation Calculator
Measure linear association between paired numeric observations.
Simple Linear Regression Calculator
Fit an ordinary least-squares line to paired numeric data.
Choosing a tool for statistics
Start with the type of data and the question. Check sample versus population definitions, independence assumptions and the chosen percentile convention.