A neuropsychologist is investigating the effect of a new sleep-hygiene program on cognitive performance. To ensure high confidence in their findings, they set their alpha level to 1%. Which of the following expressions correctly demonstrates that the difference in cognitive performance between the groups is statistically significant, allowing the null hypothesis to be rejected?
p<0.10p < 0.10p<0.10
p>0.01p > 0.01p>0.01
p<0.01p < 0.01p<0.01
p<0.001p < 0.001p<0.001
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.