You can completely represent a data set by two key values, the measure of central tendency and measure of variation. You need both these measures to portray the true nature of the data. In this post, we will look at what Variation means and what are the different measures of variation. Read on! In the […]
What are the measures of Central Tendency
You can completely represent a data set by two key values. The measure of central tendency and the measure of variation. You need both these measures to portray the true nature of the data. In this post, we will look at what central tendency means and what are the 3 measures of central tendency. We […]
Normal Distribution for Lean Six Sigma
Normal Distribution, also called Gaussian distribution, is arguably the most important distribution from a statistical analysis perspective. As a Lean Six Sigma practitioner, one needs to understand this distribution, its characteristics and applications in the projects. We will look at all the details pertaining to Normal distribution and its application in Lean Six Sigma. Read […]
Probability Distribution for Lean Six Sigma
In this post, we will look at what Probability is and its application in Lean Six Sigma context. We will also talk about discrete and continuous Probability Distribution and look at their characteristics. Before we delve into probability distribution, lets take a quick view of basic Probability concept in general. What is Probability? You must […]
Histogram – Identifying Shape of the Data
Histogram is a graphical analysis tool used to identify the shape of the data. In this post, we will discuss various characteristics of a histogram, how to identify shape or distribution of your data set using histogram and how plot a histogram using Minitab as well as excel. What is a Histogram? Histogram is a […]
Project Metric Data Type for Lean Six Sigma Project
Identifying Data type for project metric sometimes can be confusing. In this post, we discuss how to identify data type for your Lean Six Sigma project metric. And more importantly, what mistakes to avoid. Before we start talking about the data type of your project metric, we need to understand base and derived metrics. It […]
Data Type for Lean Six Sigma Projects
Why is data type important? A Lean Six Sigma project will deal with a lot of data. The project owner needs to perform various tests on such data set. The statistical tests to be performed depends on the data type. Hence, its imperative to understand the data types for all the data sets you have […]
Continuous Gage R&R – A Step by Step Approach
In this post, we will look at the step by step approach to perform Continuous Gage R&R. It is also referred to as Gage R&R. We will also explore the results of Continuous Gage R&R and how to interpret these results. In my earlier post, we looked at what Measurement System Variation means, how it can creep […]
Attribute Gage R&R – A Step by Step approach
In this post, we will look at the step by step approach to perform Attribute Gage R&R. It is also referred to as Discrete Gage R&R. We will also explore the results of Attribute Gage R&R and how to interpret these results. In my earlier post, we looked at what Measurement System Variation means, how […]
Non Normal Data : How to deal with it?
One of the most common question that I get while mentoring GB/BB projects as well as while training LSS belts is “What should I do when I have non normal data?” Normally distributed data takes a center stage in statistics. A large number of statistical tests are based on the assumption of normality of the data, which […]