📊 Statistics

Statistics

9 calculators

Chi-Square Calculator Calculate the chi-square statistic for observed and expected frequencies.
Confidence Interval Calculator Turn a sample mean and standard deviation into a range that is likely to contain the true population mean.
Correlation Calculator Calculate the Pearson correlation coefficient between two data sets.
Linear Regression Calculator Fit a least-squares regression line to two data sets and predict new values.
Margin of Error Calculator Work out how far a survey result could be from the true value, given the sample size and confidence level.
P-Value Calculator Test a sample mean against a null hypothesis and get the p-value, the z statistic and both one- and two-tailed results.
Percentile Calculator Find the value at a given percentile, or the percentile rank of a given value.
Sample Size Calculator Find how many responses a survey needs for a given margin of error and confidence level.
Z-Score Calculator Calculate a z-score and see the share of a normal distribution that falls below it.