 Our next chapter is about wrangling data in Jmovi and if you're not familiar with it, you may wonder what I mean when I say wrangling because I'm not talking about this kind of wrangling out on the range. Instead, I'm talking about this kind of wrangling where you're taking data that's in a mess. It's in a jumble and you're organizing it and you're getting it so you can analyze it. It goes by a few other names as well. Sometimes it's called data munging. Sometimes it's called data scrubbing. It can also be called data cleaning or really it just refers to the general process of preparing your data for analysis. This is really the nitty gritty of data. It's the part that's not so glamorous but absolutely critical to the success of a project. It also tends to be the most time consuming part. In fact, one of the rules of thumb of any data project is that about 80% of your time is spent preparing the data for analysis. And to help with that, we're going to talk about entering data in Jmovi, importing data, defining variables so you know what you're dealing with, computing new variables to get things ready for the form that you need and filtering cases so you can focus on subgroups and get more detailed analyses. And as we go through all this, you'll see the special function that Jmovi has to help you prepare working with your data and to get it started so you can discover the joy of clean data.