The American Statistical Association Speaks Out on P-ValuesNo single p-value can divine the truth about reality
Wed, 04/06/2016 - 16:17
P -values have been around for nearly a century, and they’ve been the subject of criticism since their origin. In recent years, the debate over p-values has risen to a fever pitch. In particular, there are serious fears that p-values are misused to… There Are No P Values for the Variables in Nonlinear RegressionHow come?
Tue, 09/23/2014 - 10:08
In a previous article, I showed why there is no R-squared for nonlinear regression. Anyone who uses nonlinear regression will also notice that there are no P values for the predictor variables. What’s going on?
Just like there are good reasons not… Lessons in Quality During a Long and Strange Journey HomeThe two sides of customer service
Tue, 02/25/2014 - 18:22
I didn’t expect that our family trip to Florida would end with me driving a plane load of passengers nearly 200 miles to their homes, but it did.
Yes, it was a long and strange journey home. A journey that started in the tropical warmth of… Regression Analysis Resource Tutorials and examples all in one place
Tue, 12/17/2013 - 16:42
Ihave written a number of blog posts about regression analysis, and I think it would be helpful to collect them in this post to create a regression tutorial. I’ll supplement my own posts with some from my colleagues.
This tutorial covers many… Statistically, How Thankful Should We Be? Part 2Assessing global poverty
Tue, 11/19/2013 - 17:50
In part one, I looked at how personal income levels fit into the global distribution of incomes. I’d be the last person to suggest that higher income guarantees more happiness. I’ve visited a number of developing countries, and as long as peoples’… Statistically, How Thankful Should We Be? Part 1A look at global income distributions
Tue, 11/19/2013 - 10:44
In the United States, our Thanksgiving holiday is fast approaching. On this day, we give thanks for the good things in our lives.
For this post, I wanted to quantify how thankful we should be. Ideally, I’d quantify something truly meaningful, like… How to Interpret Regression Analysis Results: P-values and Coefficients For simple regression, fitted line plots really bring the math to life
Fri, 07/05/2013 - 14:47
Regression analysis generates an equation to describe the statistical relationship between one or more predictor variables and the response variable. After you use Minitab Statistical Software to fit a regression model, and verify the fit by… Expanding the Role of StatisticsIt’s still more socially acceptable to rely on judgment, even when the data suggest otherwise
Mon, 05/20/2013 - 12:07
In a previous post, I wrote about how the field of statistics is more important now than ever before due to the modern deluge of data. Because you’re reading this, I’ll assume that we’re in agreement that statistics allows you to use data to… When Should I Use Confidence, Prediction, and Tolerance Intervals? Be clear about what you want to assess and use the correct tool
Fri, 04/19/2013 - 16:42
In statistics, we use a variety of intervals to characterize the results. The most well-known of these are confidence intervals. However, confidence intervals are not always appropriate. Here we’ll take a look at the different types of intervals,… Great Presidents RevisitedDoes history provide a different perspective?
Thu, 04/04/2013 - 10:59
Recently, Patrick Runkel wrote about using regression models to explain how historians ranked the U.S. presidents. Given that I both love regression and have written about using regression to predict U.S. presidential elections, I wanted to take…
