Module 2â Unit 2 Industrial Insulation Phase 2 2 Orthographic Projections Revision 2.0, August 2014 Introduction Orthographic projection is a means of representing a three dimensional object on a plane surface.Two principal planes are used in orthographic projection, one horizonta l and one vertical.odule 2â Unit 2 Industrial Insulation Phase 2 15 Orthographic Projections Revision 2.0, August 2014 2.4 Dimensioning The addition of sizes and measurements to a drawing is known as âdimensioningâ. Dimensions tell us the exact distance between two points of surfaces, therefore it is essential that they are legible.
The value of a correlation coefficient ranges between -1 and 1. The greater the absolute value of a correlation coefficient, the stronger the linear relationship. The strongest linear relationship is indicated by a correlation coefficient of -1 or 1. The weakest linear relationship is indicated by a correlation coefficient equal to 0.
r is not affected by multiplying each data set by a constant, and a constant to each data set or interchanging x and y. r is subject to outliers. rÂ² is called the coefficient of determination. It is a measure of the proportion of variance in y explained by regression. Also note that correlation is not causation. Here is an example: the shoe size of grade school students and the student's vocabulary are highly correlated. In other words, the larger the shoe size, the larger the vocabulary the student has.