课程: SAS Essential Training: 1 Descriptive Analysis for Healthcare Research

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Updating data reduction documentation

Updating data reduction documentation - SAS教程

课程: SAS Essential Training: 1 Descriptive Analysis for Healthcare Research

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Updating data reduction documentation

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- [Instructor] See the spreadsheet I have open in Excel? It's named data reduction. This spreadsheet is in your exercise files for this movie. If you are thinking the spreadsheet looks suspiciously familiar, it should. I went over this data reduction documentation when I covered curation files in the prerequisite courses. As I mentioned in the last movie, readers of your final report will want to know about selection bias. And so, you'll have to keep track of how many rows you removed at each step. This is the format of the spreadsheet I recommended you keep from the data you see in the log file so later you have these numbers and can write about them. Let's take a closer look. See our old friend 464,664? Remember, that is the number of rows in BRFSS_A, the first iteration of the data set. Now see here, I describe the criterion for exclusion, not a veteran. So how many people are not a veteran? The answer is…

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