By Christopher F. Baum

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Example The user is running a regression analysis and would like to know how to interpret the results. To understand how the test is conducted and how to interpret the results, all that must be done is to open a Regression dialog box and select the Help button. Select “Stat,” then select “Regression” and from the drop-down list, select “Regression” again. Once the dialog box opens, press the “Help” button. 32 Chapter Two After pressing “Help,” the tutorial window will appear. The tutorials contain not only an overview of the topic but also practical examples on how to solve problems and how to interpret the results obtained.

Single deviations from the mean for a given distribution measure the difference between every observation and the mean of the distribution. The deviation indicates how far an observation is away from a mean and it is denoted X − µ. The sum of all the deviations from the mean is given as (X − µ), and that sum is always equal to zero. 5, the production for Day 1 deviates from the mean by 75 units. 5 and find the sum of all the deviations from the production mean. 5 Day Production X−µ 1 2 3 4 5 6 7 700 850 600 575 450 900 300 75 225 −25 −50 −175 275 −325 Total 4375 0 Mean 625 — The mean deviation measures the average amount by which the values in a population deviate from the mean.

4 DPMO. Their main objective is to use Six Sigma for the sake of minimizing defects to the lowest possible rates and increase customer satisfaction. 5 sigma shift remain very controversial among the six sigma practitioners. This page intentionally left blank Chapter 2 An Overview of Minitab and Microsoft Excel Learning Objectives: Understanding the primary tools used in Minitab and Excel The complexity involved in manipulating some statistics formulae and the desire to get the results quickly have resulted in the creation of a plethora of statistical software.

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A review of Stata 8.1 and its time series by Christopher F. Baum


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