Posts Tagged ‘ Statistical Graphics ’

Odds ratio plots with a logarithmic scale in SAS

July 29, 2015
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Odds ratio plots with a logarithmic scale in SAS

I recently read an argument by Andrew Wheeler for using a logarithmic axis for plotting odds ratios. I found his argument convincing. Accordingly, this blog post shows how to create an odds ratio plot in SAS where the ratio axis is displayed on a log scale. Thanks to Bob Derr […] The post Odds ratio plots with a logarithmic scale in SAS appeared first on The DO Loop.

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Create a density curve with shaded tails

July 20, 2015
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Create a density curve with shaded tails

A SAS programmer wanted to plot the normal distribution and highlight the area under curve that corresponds to the tails of the distribution. For example, the following plot shows the lower decile shaded in blue and the upper decile shaded in red. An easy way to do this in SAS […] The post Create a density curve with shaded tails appeared first on The DO Loop.

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Visualizing the distribution of ACT scores

July 17, 2015
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Visualizing the distribution of ACT scores

My son is in high school and plans to take the ACT, a standardized test to assess college aptitude and readiness. My wife asked, "What is a good score for the ACT?" I didn't know, but I did a quick internet search and discovered a tabulation of scores for the […] The post Visualizing the distribution of ACT scores appeared first on The DO Loop.

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An Excel add-in for regression analysis

July 8, 2015
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Bob Nau writes: I know you are not particularly fond of Excel, but you might (I hope) be interested in a free Excel add-in for multivariate data analysis and linear regression that I am distributing here: http://regressit.com. I originally developed it for teaching an advanced MBA elective course on regression and time series analysis at […] The post An Excel add-in for regression analysis appeared first on Statistical Modeling, Causal…

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“Menstrual Cycle Phase Does Not Predict Political Conservatism”

July 5, 2015
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“Menstrual Cycle Phase Does Not Predict Political Conservatism”

Someone pointed me to this article by Isabel Scott and Nicholas Pound: Recent authors have reported a relationship between women’s fertility status, as indexed by menstrual cycle phase, and conservatism in moral, social and political values. We conducted a survey to test for the existence of a relationship between menstrual cycle day and conservatism. 2213 […] The post “Menstrual Cycle Phase Does Not Predict Political Conservatism” appeared first on Statistical…

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Hey, what’s up with that x-axis??

June 22, 2015
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Hey, what’s up with that x-axis??

CDC should know better. P.S. In comments, Zachary David supplies this correctly-scaled version: It would be better to label the lines directly than to use a legend, and the y-axis is off by a factor of 100, but I can hardly complain given that he just whipped this graph up for us. The real point […] The post Hey, what’s up with that x-axis?? appeared first on Statistical Modeling, Causal…

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You can crush us, you can bruise us, yes, even shoot us, but oh—not a pie chart!

June 18, 2015
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You can crush us, you can bruise us, yes, even shoot us, but oh—not a pie chart!

Byron Gajewski pointed me to this several-years-old article from the Onion, which begins: According to a groundbreaking new study published Monday in The Journal Of The American Statistical Association, somewhere on the planet someone is totally doing it at this very moment. “Of the 6.7 billion inhabitants of Earth, approximately 3.5 billion have reached sexual […] The post You can crush us, you can bruise us, yes, even shoot us,…

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The mystery of the density curve that was too short

June 3, 2015
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The mystery of the density curve that was too short

I was reading a statistics book when I encountered a histogram that caught my eye. The histogram looked similar to the one at the left. It contained a normal density estimate overlaid on a histogram, but the height of the density curve seemed too short when compared to the heights […] The post The mystery of the density curve that was too short appeared first on The DO Loop.

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Improving the NC vehicle inspection pie chart

May 18, 2015
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Improving the NC vehicle inspection pie chart

North Carolina is a state that requires yearly inspections of motor vehicles. An inspection checks for safety features (lights, brakes, tires,....) as well as checking vehicle emissions to ensure that vehicles meet air pollution standards. I recently had a car inspected and noticed a pie chart on the inspection's summary […] The post Improving the NC vehicle inspection pie chart appeared first on The DO Loop.

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I actually think this infographic is ok

May 15, 2015
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Under the heading, “bad charts,” Mark Duckenfield links to this display by Quoctrung Bui and writes: So much to go with here, but I [Duckenfield] would just highlight the bars as the most egregious problem as it is implied that the same number of people are in each category. Obviously that is not the case […] The post I actually think this infographic is ok appeared first on Statistical Modeling,…

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