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At QIMTonline, we don't just want to be the best on-line metrology training provider, we are setting a new standard for the delivery of on-line training!

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10612 LaFollette Dr.
Brighton, MI 48114
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Online Metrology CoursesMeasurement Uncertainty Class
Metrology Software for ISO/IEC17025 Laboratories

Try a Free Metrology Demo Course!

ATTENTION: Our upcoming April, 2015 Measurement Uncertainty Class is FULL filling up rapidly, with only ONE (1) open seat remaining. Our next Class will be in August. Class includes hands-on training with UncertaintyToolbox™ working on actual student submitted Measurements.

We restrict the size of our highly interactive Measurement Uncertainty Classes to ensure enough time to work on some actual measurement models from each attendees' work center. See our unique "Learning Guarantee" by clicking the 'Measurement Uncertainty Public Classes' icon above.

Our Software User Groups Area provides support for QUAMETEC™ Microsoft® Excel® VBA based Metrology Software. WebOps™ is a trademark of the Quametec™ Corporation.

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QIMT Glossary

standard deviation


"Measure of the unpredictability of a random variable, expressed as the average deviation of a set of data from its arithmetic mean and computed as the positive square root of the variance. Customarily represented by the lower-case Greek letter sigma (σ), it is considered the most useful and important measure of dispersion which has all the essential properties of the variance plus the advantage of being determined in the same units as those of the original data. Also called root mean square (RMS) deviation."

As per the ISO GUM, the standard deviation = the standard uncertainty for the given contributor.
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