This practice applies to any test record that has a region where the dependent and independent variables are approximately proportional. There should be only one proportional region, or if there is more than one, the region where the slope is desired should be extracted.
There are many ASTM standards where analysis of data requires that a slope be determined in a linear region. At this time there is no standard method for evaluating the test record, determining the region to be fit and the quality of the resulting fit. This practice could be referenced by many mechanical testing standards.
Linear Regression; Residuals; Goodness of Fit; Quality of Data; Digital Resolution
The title and scope are in draft form and are under development within this ASTM Committee.
Citing ASTM Standards
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