A pharmaceutical scientist is conducting a clinical trial to investigate the relationship between the daily dosage of a new experimental drug (measured in mg) and the reduction in patients' systolic blood pressure (measured in mmHg).
The researcher randomly selects 25 participants diagnosed with hypertension. Over a six-week period, each participant is administered a specific dosage, and their reduction in blood pressure is recorded.
The researcher hypothesises that there is a significant positive correlation between the dosage of the drug and the reduction in systolic blood pressure.
Explain why the researcher decided to use the 1% level of significance (p≤0.01p \le 0.01p≤0.01) rather than the standard 5% level (p≤0.05p \le 0.05p≤0.05) in this study.
121 exam-style questions on AQA A Level Psychology Inferential testing (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.