Which one is correct about the least squares method? O A) The main purpose when applying the least squares method is to find the most suitable equation that minimizes the departure of the actual experimental results from the regression line. O B) The fact that the R value is zero, indicates that the agreement between the obtained curve and the experimental results is very good. O ) Instead of using a series of formulas in the least squares method, we can perform regression analysis with Microsoft Word program. O D) The curve obtained by the least squares method is called the bell curve. O E) The fact that the R value is one, indicates that there is no agreement between the curve obtained and the experimental results.
Theory and Design for Mechanical Measurements
Measurement is a term that refers to analyzing a manufactured component regarding the degree of accuracy for dimensions, tolerances, geometric profile, roundness, flatness, smoothness, etc. Measurement always involves comparing the manufactured component or the prototype with a standard specimen whose dimensions and other parameters are assumed to be perfect and do not undergo changes with respect to time.Precisely in mechanical engineering the branch that deals with the application of scientific principles for measurements is known as metrology. The domain of metrology in general deals with various measurements like mechanical, chemical, thermodynamic, physical, and biological measurements. In mechanical engineering, the measurements are limited to mechanical specific such as length, mass, surface profile, flatness, roundness, viscosity, heat transfer, etc.
Basic principles of engineering metrology
Metrology is described as the science of measurement, precision, and accuracy. In other words, it is a method of measurement based on units and predefined standards.
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