Which test do I need
A few questions and you are at the right calculator. No statistical vocabulary required.
What do you want to do with your data?
Describe a single set of numbers
Mean, median, spread, histogram.
Find out whether two measures are related
For example: advertising spend and sales.
Compare groups or conditions
For example: patients who got the drug and those who did not.
Check whether observed counts match what was expected
For example: is the die fair, does the sample match the real proportions.