December 2014
Intermediate to advanced
154 pages
3h 33m
English
Content preview from Root Cause Analysis
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Exploratory Data Analysis
INTRODUCTION
Exploratory data analysis (EDA) was created by John Tukey for visually
analyzing data as a basis for forming hypotheses and to help determine
which methodologies should be used (Tukey, 1977).
Key Points
• EDA is used to form a hypothesis and visualize data.
• Conrmation testing should be performed aer EDA has identied
a potential root cause.
Procedure
Step 1: Collect data and then graphically display the data using one or
more of the EDA methods. Display the data according to time, loca-
tion, or any other potentially relevant factor.
Step 2: Perform conrmation testing.
STEM- AND- LEAF PLOT
A stem- a
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.