Statisticians frequently assume that data follow a normal distribution when developing statistical methods and performing practical data analysis. In most introductory statistics textbooks, the ...

The generation of custom graphs with Microsoft Excel enables an engineer or analyst to plot untransformed data for gaining an understanding of problems related to oil and gas operations. The ...

A bell curve is a graph used to visualize the distribution of a set of chosen values across a specified group that tend to have central, normal values that peak, with low and high extremes tapering ...