Which country has the most powerful passport?

October 26, 2017
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If you plan to travel abroad and see the world, you'll need a passport. And, depending on several factors, you might also need travel visas. Which passports allow you to travel with the least amount of hassle (and the least amounts of visas)? Let's cre...
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Finding your Dream Car with a little macro magic

October 25, 2017
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Suppose you want a list of car manufacturers from the CARS dataset. Easy!  Call the %CHARLIST macro from a %PUT statement, like this: The CHARLIST macro generates a list of unique values of a selected variable from a selected dataset. So does PROC FREQ. But, if you don't need statistics, the CHARLIST

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Should you use principal component regression?

October 25, 2017
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This article describes the advantages and disadvantages of principal component regression (PCR). This article also presents alternative techniques to PCR. In a previous article, I showed how to compute a principal component regression in SAS. Recall that principal component regression is a technique for handling near collinearities among the regression

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Do you say coke, pop, or soda?

October 24, 2017
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Quick Quiz! Where might you hear the following conversation? ... Waitress: "What would you like to drink, honey?" Customer: "I'll have a coke." Waitress: "What kind?" Customer: "Diet Pepsi." If you answered somewhere between Texas and Georgia, you woul...
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Principal component regression in SAS

October 23, 2017
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Principal component regression in SAS

A common question on discussion forums is how to compute a principal component regression in SAS. One reason people give for wanting to run a principal component regression is that the explanatory variables in the model are highly correlated which each other, a condition known as multicollinearity. Although principal component

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Compatibility between model data and the target population

October 20, 2017
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To make accurate predictions, it is necessary that the sample data you use for model development is compatible with the target population. The distribution of each input used in the model should be similar in the sample and the target population. In yo...
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The diffogram and other graphs for multiple comparisons of means

October 18, 2017
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The diffogram and other graphs for multiple comparisons of means

In a previous article, I discussed the lines plot for multiple comparisons of means. Another graph that is frequently used for multiple comparisons is the diffogram, which indicates whether the pairwise differences between means of groups are statistically significant. This article discusses how to interpret a diffogram. Two related plots

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RDU airport -vs- surrounding parks and nature

October 17, 2017
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In growing areas such as the Research Triangle Park, there is always the tough decision between developing land for business, or keeping it natural for parks and recreation. SAS is fortunate to have the great hiking trails at Umstead Park just across t...
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Share your SAS Certification experience and maximize value

October 17, 2017
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You know the value of your SAS Certification; does the rest of the world? A recent MONEY and Payscale.com study named SAS Analytics skills as the most valuable skills to have in today’s job market and certification is the best way to demonstrate those skills. Recognition like this helps solidify

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