One can use statistical software packages to calculate the level of control the process is under, and one may, for example, use process capability indices that compare the output of an in-control process to the specification limits. Indirect proxies for controllability metrics could also be the amount of materials and/or energy consumed per kg of product caused by excursions outside the control zone. For example, a rejected batch will become waste, and additional mass and energy will be required to replace or rework the rejected batch. [Pg.37]

The statistical software package SAS (SAS Institute Inc., Cary, North Carolina, U.S.A.) has a module [PROC MIXED (10)], which analyzes mixed effects models and provides estimates for both the fixed (shifts on the mean) and random effects (variance components estimates). [Pg.25]

The transformation of the y values depends upon the amount of curvature the procedure induces. The Box-Cox transformation automatically finds the correct transformation, but it requires an adequate statistical software package and should not only be used as the final answer, but also should be checked. The same strategy is used in Applied Statistical Designs for the Researcher (Paulson, 2003). But from an iterative perspective, Montgomery et al. also present a useful variance standardizing schema. [Pg.299]

Hammer, 0., Harper, D.A.T. and Ryan, P.D. (2001) PAST paleontological statistics software package for education and data analysis. Palaeontologia FJectronica, 4(1) http //palaeoelectronica.org/2001 l/ past/issuel 01. htm. [Pg.237]

The analysis begins with ordering all 15 observations. Note that statistical software packages order and rank the observations and do the ANOVA for you. The ordered observations from lowest to highest across the three groups are as follows [Pg.168]

With the widespread availability of hand-held calculators, computer spreadsheets, and statistical software packages for PCs, there is no need to do the calculations outlined above by hand. [Pg.67]

Whenever researchers perform a regression analysis using data collected over time, they should conduct the Durbin-Watson Test. Most statistical software packages have it as a standard subroutine and it can be chosen for inclusion in [Pg.109]

This is the most common approach in QSAR to develop a quantitative linear correlation model, althongh not necessary always best for a given data set. The simplest means to obtain such a quantitative relationship is to nse MLR available in any statistical software package. MLR generates predictive equations of the form [Pg.498]

With single-precision computations, numbers with at least seven decimal places will be generated. Many statistical software packages give six places. This should be sufficient for most purposes. [Pg.98]

The discipline of chemometrics provides a number of methods to deal with such problems. During the last years many of these methods became available for PCs, either by statistical software packages or by specific software developed by chemists. A variety of chemometric methods is, in principle, now available at the chemist s own desk. Although the chemist usually is not an expert in multivariate statistics he/she is forced to use such methods, because of the complexity of actual problems in chemistry. [Pg.43]

Excel offers a number of statistical functions, listed under the Tools menu. Go to Add-Ins, and check Analysis ToolPak. Click OK and return to the spreadsheet. Now when you go to the Tools menu, you will see Data Analysis. Go to that, and you will see 19 statistical programs listed. As you experiment with these, you will find some very useful. One Add-In that is very useful is Solver, for solving complicated formulas. Its use is described in Chapter 6. See also the text website www.wiley. com/college/christian for a list of some commercial software packages for performing basic as well as more advanced statistical calculations. [Pg.111]

Professor Wakeham is interested in the relationship between the bulk thermophysical properties of fluids and the intermolecular forces between the molecules that comprise them. Thus, at one extreme, he is involved in the determination of intermolecular forces from measurements of macroscopic properties and the development and application of the statistical mechanics and kinetic theory that interrelate them. He is also actively involved in the measurement of the thermophysical properties of fluids under a very wide variety of thermodynamic states. The same thermophysical properties find application in the process industries within the design of a plant. A part of Professor Wakeham s activities are therefore concerned with the representation and extension of a body of accurate information on thermophysical properties in a fashion that allows their use with software packages for process simulation. [Pg.141]

© 2019 chempedia.info