What is the probability of obtaining a significant result by chance alone when the chosen significance level is p≤0.005p \le 0.005p≤0.005?
0.5% or less
5% or less
at least 99.5%
less than 0.5%
513 exam-style questions on OCR A Level Psychology Data recording, analysis and presentation. Each one has a worked solution and a mark scheme showing where the marks go.