Stratified Sampling is now available in #Tableau Prep. #data #businessintelligence #analytics

0:00You can see here I have Stratified switched

0:03on and it's actually working on the default

0:04column in my data set.

0:06Essentially the default column describes

0:07how many people have defaulted on payments.

0:10So if I actually go back to clean step

0:12number one and I go to the default column

0:14you'll see that I have an equal

0:16representative split of my data.

0:18Which means in Tabulate Prep when I'm

0:19working on this I can keep the sampling

0:21behavior on but still have everything

0:23performant and easy.

0:25Well what does it look like if I disable

0:27Stratified Sampling? Let me show you. Here

0:30I have 50 records from each and the default

0:31payments.

0:32Now if I go to the credit data and I go to

0:34data sample and then I switch off Strat

0:36ified Sampling and go back to Quick Select

0:40which is the default method.

0:41Now I still have 100 rows coming in but if

0:43I go back to clean one you can see there's

0:44100 rows there.

0:46But over here on the left hand side the

0:48default percentage is now split. It's gone

0:50back to represent what was originally in

0:52the data set.

0:53And so this allows you to work more easily

0:55and quickly in Tabulate Prep.