Mean imputation in SAS

December 4, 2017
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Mean imputation in SAS

Imputing missing data is the act of replacing missing data by nonmissing values. Mean imputation replaces missing data in a numerical variable by the mean value of the nonmissing values. This article shows how to perform mean imputation in SAS. It also presents three statistical drawbacks of mean imputation. How

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Let’s analyze Trump’s tweets

November 30, 2017
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Since Trump because the US president, many people have noticed that he posts a lot of tweets. While some people choose to analyze and critique the content of those tweets, I was more curious about something a little less controversial - the timing and quantity....
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When and where have they legalized ‘it’?

November 29, 2017
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Whether or not to legalize marijuana is a hotly debated topic these days. And no matter which side of the debate you're on, I think you will be interested in seeing several ways to visualize which states have legalized marijuana, and when ... Their...
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Visualize patterns of missing values

November 29, 2017
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Visualize patterns of missing values

Missing values present challenges for the statistical analyst and data scientist. Many modeling techniques (such as regression) exclude observations that contain missing values, which can reduce the sample size and reduce the power of a statistical analysis. Before you try to deal with missing...
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Learn more about SAS Viya with resources from SAS Education

November 28, 2017
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SAS Viya is an exciting addition to the SAS Platform, allowing you to conduct analysis faster than ever before and providing you the flexibility to utilize open source technologies and generate insights from data in any computing environment. The blog ...
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What’s the most likely location for Amazon’s HQ2?

November 27, 2017
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The most highly anticipated business announcement this fall is probably the location for Amazon's second headquarters (dubbed HQ2). Amazon plans to spend $5 billion on their HQ2, and employ about 50,000 people in high-tech jobs. They received 238 proposals before their October 19 deadline,...
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The method of moments: A smart way to choose initial parameters for MLE

November 27, 2017
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The method of moments: A smart way to choose initial parameters for MLE

When you run an optimization, it is often not clear how to provide the optimization algorithm with an initial guess for the parameters. A good guess converges quickly to the optimal solution whereas a bad guess might diverge or require many iterations to converge....
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What’s the must-have Thanksgiving side dish?

November 22, 2017
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If you're preparing a big Thanksgiving dinner, then you don't want to leave out the most popular side dish, do you?!? But what is the most popular side dish? ... If you don't already know, then perhaps some data & analytics can help! But...
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Compute the CDF and quantiles of discrete distributions

November 22, 2017
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Compute the CDF and quantiles of discrete distributions

A statistical programmer read my article about the beta-binomial distribution and wanted to know how to compute the cumulative distribution (CDF) and the quantile function for this distribution. In general, if you know the PDF for a discrete distribution, you can also compute the...
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