Exciting, long-awaited update! With the release of version 0.8.0.0, JASP can now ingest .sav files, the format used and generated by SPSS. Read about other developments in the release notes.Read more "Updates and features!"
Correlations are a way to describe relationships between two variables. A correlation coefficient, a number usually abbreviated as r, summarizes how strong the relationship is between two variables: it can range from 0 (there’s no relationship at all between the two variables), to 1 (as one changes, the other changes by a perfectly predictable, proportionate amount). Whether […]Read more "Correlation"
It’s worth mentioning, Excel is to spreadsheets as Kleenex is to tissues; a giant in the category, but not the only game in town. Different types of files are marked by different extensions — Excel files end in a .xlsx or .xls. That tells you that data is stored in columns and rows, and also that you […]Read more "A Note on Filetypes"
Really getting to know your data doesn’t stop at skimming through a spreadsheet at high speed, or making a few bar graphs. It’s important to know how many times each value shows up for some variables. This is called a variable’s distribution, and the shape of the distribution becomes very important when considering different kinds of tests down […]Read more "The Histogram"
Picking up where we left off, what if wanted to know more about that survey sample? I know how many participants came from each location, but were the numbers of men and women similar for each location? We need to compare both categorical variables – Location and Gender – at the same time. The ‘Frequencies’ tab […]Read more "Describing your Data with Crosstabs"
Nonprofits have lots of questions. Are you making an impact? How can you prove it? Who is using your services, and why? Is the answer hidden in AdWords? Why is SalesForce so awful? Does any of this matter? Some questions …are easier to answer than others. So let’s start with the descriptive ones. Here’s a […]Read more "A First Look at Descriptive Stats"
Short answer: You don’t, you have enough to do. Long answer: A critical mass of funding sources are demanding impact metrics. Now, you could hire a consultant to do this for you, but it would be nice to know what you’re getting. The move to quantify impact isn’t just about bean counting… it’s about making the best decisions for your […]Read more "Why Do I Need To Learn This?"