Statistics Calculators (Page 2)

Mean, probability, distributions, hypothesis testing and more.

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

Compute two-tailed and one-tailed p-values from a z-score.

Run Welch's two-sample t-test and get the t statistic, degrees of freedom and p-value.

Run a 2×2 chi-square test of independence and get the χ² statistic and p-value.

Compute the margin of error MoE = z·√[p(1−p)/n] for a proportion.

Compute the confidence interval for a population proportion: p ± z·√[p(1−p)/n].

Run a one-way ANOVA on three groups and get the F statistic and p-value.

Compute the odds ratio OR = a·d/(b·c) and its 95% confidence interval from a 2×2 table.

Compute relative risk RR = [a/(a+b)]/[c/(c+d)] and its 95% confidence interval from a 2×2 table.

Compute Cohen's d, the standardized difference between two group means.