# Accuracy

## Description

The accuracy of a measurement system is the degree of closeness of measurements of a quantity to that quantity’s actual (true) value. Accuracy is also used as a statistical measure of how well a binary classification test correctly identifies or excludes a condition. The accuracy is the proportion of true results (both true positives and true negatives) in the population.

Related formulas## Variables

ACC | Accuracy (dimensionless) |

TP | Number of True Positives (correctly identified) (dimensionless) |

TN | Number of True Negatives (correctly rejected) (dimensionless) |

FP | Number of False Positive (incorrectly identified) (dimensionless) |

FN | Number of False Negatives ( incorrectly rejected) (dimensionless) |