A cognitive neuroscientist measures the change in blood-oxygen-level-dependent (BOLD) signals in the prefrontal cortex during a decision-making task. After conducting four distinct statistical comparisons across different brain regions, they obtain the following ppp-values for the activation differences. Which ppp-value indicates the highest level of statistical significance, allowing the researcher to reject the null hypothesis with the greatest degree of confidence?
p=1.5×10−2p = 1.5 \times 10^{-2}p=1.5×10−2
p=8.5×10−3p = 8.5 \times 10^{-3}p=8.5×10−3
p=4.0×10−4p = 4.0 \times 10^{-4}p=4.0×10−4
p=2.5×10−1p = 2.5 \times 10^{-1}p=2.5×10−1
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.