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Europe Tools Article Archive
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Quality Spotlight Archive | Management Spotlight Archive | Tools Spotlight Archive Readers' Choice: View All Top-Rated Articles Archives by Year: 2008 | 2007 | 2006 | 2005 | 2004 | 2003 - Using the 1-Sample Sign Test for Paired Data
Although the paired t-test will work for normally distributed sets of paired data, a nonparametric alternative must be used for non-normal data: the 1-sample sign test. This test makes it possible to compare observed and hypothesized medians. Read the full article. July 9, 2008
- Understanding the Uses for Mood's Median Test
The Mood's median test is used to test the equality of medians from two or more populations and holds no assumptions about specific distribution. Therefore, it provides a nonparametric alternative to the one-way ANOVA, which requires normality. Read the full article. June 11, 2008
- Making Data Normal Using Box-Cox Power Transformation
Data transformation, particularly the Box-Cox power transformation, is a remedial action that may help to make data normal. By understanding transformation and the Box-Cox method, practitioners will be better prepared to work with non-normal data. Read the full article. April 16, 2008
- Dealing with Non-normal Data: Strategies and Tools
Some people believe – incorrectly – that all data collected and used for analysis must be normally distributed. But there are tools that do not need normality, as well as a number of ways to acheive normality if tools requiring it are necessary. Read the full article. April 2, 2008
- Use a Modified FMEA to Mitigate Project Risks
In order to prevent risks from happening, or at least to be prepared when they occur, team members should assess the key risks of any project and make a plan to address them. A FMEA chart is a helpful tool in tracking these risk-mitigation efforts. Read the full article. March 19, 2008
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