Learning Activities
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This learning task focuses on determining if a set of data is normally distributed. Many times we assume that those parts are produced by processes that generate variation that is normally distributed. Making this assumption can produce significant predictive errors. In the Process Control Module in the second half of this course of this course we will address the question "is this process in statistical control? and therfore predictable." If we have the data with no history of the process, then the analytical tool, Normal Probability Paper, can allow us to determine the Normality of a distribution without the use of statistical tests. You will extend your Excel skills by practicing your analysis processing skills on Homework Set #4 |
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Is this process producing parts that follow the normal distribution?
The carillon web site provides instruction about graphing data on normal probability paper.
In addition, the web site provides an excel worksheet that calculates median rank probabilities.
A second link provides a link to weibull.com a company that provides .pdf probability paper files for the exponential, normal, and weibull distributions.
Link to Carillon Technologies Site - Normal Probability Paper
