Sample Proportion Calculator

Calculate sample proportion with confidence intervals

Number of Successes (x):

Sample Size (n):

Confidence Level:

The sample proportion (p-hat) is the ratio of successes to the total sample size. It estimates the population proportion.

Formula: p-hat = x / n

Standard Error: SE = sqrt(p(1-p)/n)

The Wilson score interval is recommended when proportions are close to 0 or 1, or when sample sizes are small.