Click here for the Web version of the current issue  

MiC Quality


Our Best Wishes for Christmas and New Year 2009


Past Issues
October 2008
June 2008
April 2008
February 2008
December 2007
October 2007
August 2007
June 2007
April 2007
February 2007



In Focus: Nonparametric Tests

In this issue:

To unsubscribe please use the contact form and select "Unsubscribe from Updates".

:: Recession Specials

The downturn in the economy makes the advantages of online learning more compelling than ever. Companies can use e-learning to avoid the costs of travel and lost productivity. Employees can enhance their skill base to become more attractive to employers. Wise companies will also use some of spare capacity to improve their processes and become as efficient and competitive as they possibly can.

In order to help coping with the recession we have created a new special that allows to select any 2 of our courses and receive $90 off the combined individual prices. This is separate to our standard packages with discounts for both statistics, both SPC, or both DOE courses. So if you would like to take, for example, DOE and MSA courses, you will save $90. If you enroll before Christmas you can also take advantage of our second special - 2 weeks extra free of charge. See the relevant Promotional Codes below.

:: Special: $90 Off on Any 2 Courses till January 15

Statistics+SPC, SPC+DOE, DOE+MSA
or Any Other 2 Courses of Your Choice

QUOTE Promotional Code IN90

:: Special: 2 Weeks Extra FREE till December 24

On Any Course or Package
QUOTE Promotional Code FE08

:: Planned Additions

We are currently reworking our Advanced Statistics course. Many of the students who take this course work in scientific research or healthcare. We are adding more material on hypothesis testing and nonparametric tests, including more exercises and case studies. We will also divide the course into a number of separate modules so people can select the topics they need thus saving some money.

We will be releasing a PDF version of our Six Sigma and Quality Glossary (available online at: https://micquality.com/six_sigma_glossary/index.htm) in January. Apart from the electronic version we will be offering printed versions in standard and pocket sizes. We are also exploring options for publishing all our reference materials in a book form.

If you are interested in getting a copy of the Glossary or the complete Reference book please let us know. The cost will depend on the format and how much interest we will get.

:: Nonparametric Tests

Most types of hypothesis test require that the population conforms to a particular distribution, usually the normal distribution. Where this is not the case a nonparametric test can be used.

Nonparametric tests make no assumptions about the type of distribution (although they may require symmetry, or some other property). The disadvantage is that nonparametric tests are not as efficient; for a given data set the nonparametric test will give a higher p-value.

Nonparametric Tests include:

Friedman's Test nonparametric alternative to two way ANOVA
Kruskal Wallis Test nonparametric alternative to ANOVA
Levene's Test tests for equality of variances of several samples
Mann Whitney Test nonparametric alternative to two sample t-test
Mood's Median Test nonparametric alternative to ANOVA
Sign Scores Test alternative name for Mood's Median Test
Wilcoxon Rank Sum Test same as the Mann Whitney Test
Wilcoxon Signed Rank Test nonparametric equivalent to one sample t-test

Parametric tests include ANOVA, the t test, the F test and the chi-square test.

:: Six Sigma Primer
:: Statistical Process Control (SPC), Advanced Statistical Process Control
:: Design of Experiments (DOE), Advanced Design Of Experiments
:: Primer in Statistics, Advanced Statistics
:: Measurement Systems Analysis (MSA)/ Gage R&R
:: FREE Excel Primer
:: FREE Sample Module "Introduction to Statistics"
FREE Statistics Reference Booklet
FREE Six Sigma Summary Booklet
DOWNLOAD Brochure for All Courses


500+ terms Six Sigma Glossary
(includes all terms in the ASQ SSBB Six Sigma Black Belt Body of Knowledge)


Sigma Calculator


Book Reviews

:: Reference Tables
:: Next Update

Next update will come out in February 2009.
Due to Victorian bushfires there will be no update in February.