Graphing your Data

Now that I have some data, what do I do with it?

Plot it out visually. Try drawing various kinds of graphs, charts, and histograms, of various combinations and permutations of your data.

Once you understand the data, you will need to test it statistically.

next: statistical tests
Experimental Design for Wearable Computing -- Statistical Testing

Statistical Testing

What sort of statistical tests should I do? There are so many....

Appropriate testing depends on aspects of your design:

  • how many conditions
  • what type of measurements
as well as on how the data turned out:
  • is it normally distributed
  • are the standard deviations the same among conditions

Make friends with neighborhood applied mathematicians or experimental scientists. For HCI issues, your local psychology department is probably full of friends.

next: p-value