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Engineering Data Analysis2D

Introduction to Data Analysis - Theory & Concepts - Engineering Data Analysis Bias Precision

Overview of statistics in engineering, data collection methods, observational studies versus experiments, and sampling techniques.

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Engineering Data Analysis • Topic 1

Bias vs. Precision Target Visualizer

Bias (Systematic Error)Low
Centred (Accurate)Highly Biased
Precision (Random Error)High (Tight Cluster)
Broad SpreadTight Cluster

Concept Summary

Accuracy (Low Bias): The average of the measurements is very close to the true value (the bullseye).

Precision: The degree to which repeated measurements show the same results (tightness of the grouping), regardless of whether they are correct.

Shot at (162.0, 138.0)Shot at (161.4, 137.6)Shot at (164.2, 140.3)Shot at (171.6, 134.1)Shot at (171.9, 152.9)Shot at (145.2, 146.4)Shot at (141.8, 133.0)Shot at (176.9, 142.1)Shot at (153.6, 143.1)Shot at (158.8, 117.4)Shot at (163.8, 131.1)Shot at (159.2, 136.9)Shot at (145.6, 136.2)Shot at (163.9, 137.0)Shot at (161.1, 137.0)