One or two tailed test? IB Psych IA Tips.

Choosing the wrong test can cost you 2 marks in the IB Psychology IA. In this video I explain which test you should do - one or two tailed.

Stats Enthusiasts: Yes, I'm aware there's a debate about in Psychology about which tests you use and some argue two-tailed are the best to use regardless. This advice is for the IB Psychology IAs and we keep it pretty simple.

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