Standard Deviation & CV Calculator

Introduction：

Input multiple groups of experimental data to calculate average, sample standard deviation and coefficient of variation for ISO lab test reports. Laboratory test data often requires statistical analysis for parallel groups. This standard deviation calculator automatically computes average value, sample standard deviation, and coefficient of variation (CV) from multiple test data points. Fully compliant with ISO laboratory data evaluation rules, it helps engineers judge data stability, repeatability, and test reliability for formal inspection reports and quality analysis documents.