You have the data. Now which test?
Picking the method is the part the lecture skips and the exam assumes. Here it is the first question you answer instead of the one you guess at, and every answer comes with the reasoning attached.
The descriptives are done. The deadline is Thursday. And you are staring at a perfectly good dataset with nine plausible tests and no way to work out which one belongs to your question.
Two questions, then the method
What did you measure, and who did you measure it on. Neither question assumes you already know the answer, which is the flaw in every flowchart printed on page 412 of a textbook.
Two measurements from the same people, before and after. That is a paired t-test — and the selector tells you that treating them as two independent groups would have thrown away the pairing that makes the comparison work.
Then it hands you off instead of dropping you
Knowing the name of the test has never been the same as being able to run it.
The answer is a door, not a label
The recommendation opens the tool, already configured for the comparison you described. You never have to go hunting through a menu for something whose name you just learned.
Professor Mode makes you do it
A walkthrough opens beside the tool and spotlights the one control that matters next. It will not advance until you have actually clicked it, so you cannot skim your way to the end.
The output arrives translated
Beside every result is what it licenses you to claim. A p-value of 0.03 shows up attached to a sentence you could defend in a seminar, not floating in a table on its own.
What is standing behind that
⚠️ The fair objection
"If the tool picks the test, what exactly am I learning?"
That would be a real problem if it just returned a name. It does not. Each branch tells you which distinction it is drawing and why your answer sent you left rather than right, and Professor Mode makes you perform every step instead of watching one. The measure of success is that you stop opening the selector — and most students do, somewhere around the second half of a course.