One-variable statistics
Leaving Y blank calculates Σx, powers of x, mean, count, population and sample variance, population and sample standard deviation, minimum, Q1, median, Q3 and maximum.
Two-variable statistics and regression
When X and Y contain the same number of values, the tool also calculates paired summations, covariance-related measures, Pearson correlation, linear regression, quadratic least-squares regression, logarithmic, exponential, power and reciprocal models.