Statistics Calculators (Page 3)

Mean, probability, distributions, hypothesis testing and more.

Compute Welch t statistic and degrees of freedom from two groups.

Compute the confidence interval for the difference of two means.

Compute mean, CDF and PDF of the exponential distribution.

Compute sample proportion p and its standard error from x and n.

Compute the F statistic (variance ratio) from two SDs.

Compute P(X=k) for a binomial distribution.

Compute P(X=k) for a Poisson distribution.

Compute P(A∪B) from P(A), P(B) and P(A∩B).

Convert a probability p to odds = p / (1−p).

Compute sensitivity, specificity, PPV, NPV and accuracy from a 2×2 table.

Compute Cohen's d effect size from two groups.

Compute weighted mean x̄w = Σwᵢxᵢ / Σwᵢ from three (value, weight) pairs.