An educational psychologist, Dr. Aris, conducted an investigation into the relationship between a student's primary study method and their final exam outcome.
| Passed the exam | Failed the exam | |
|---|---|---|
| Group A: Used retrieval practice flashcards | 45 | 15 |
| Group B: Used rereading of notes | 24 | 36 |
State two reasons why Dr. Aris used a chi-squared test of association to analyse her data.
Practise Edexcel A Level Psychology Methods with exam-style questions for A Level Psychology. 100 questions, matched to the Edexcel A Level Psychology (9PS0) specification and written in Paper 1, Paper 2 and Paper 3 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.