Education and School Calculations

Calculate normal-distribution probabilities, z-scores, tails, intervals and inverse percentiles from a mean and standard deviation.

Calculate a least-squares regression line, Pearson correlation, R², residual error and predictions from paired X and Y data.

Calculate 2×2 and 3×3 matrix multiplication, addition, subtraction, determinant, inverse and transpose with checked examples.

Solve 2×2 and 3×3 linear systems, classify unique, inconsistent or dependent equations, and inspect ranks, RREF, determinant and residual.

Calculate midpoint, distance, slope, line equation, section point or a missing endpoint from 2D or 3D Cartesian coordinates.