A researcher is planning an investigation to see if drinking chamomile tea before bed improves sleep quality, measured by the number of nightly awakenings. They decide to write a directional (one-tailed) hypothesis.
Which of the following statements represents a correct directional hypothesis for this study?
Participants who drink chamomile tea before bed will experience a different number of nightly awakenings compared to those who drink warm water.
There will be a significant negative correlation between the volume of chamomile tea consumed and the number of nightly awakenings.
Participants who drink chamomile tea before bed will experience significantly fewer nightly awakenings than those who drink warm water.
There will be no significant difference in the number of nightly awakenings between participants who drink chamomile tea and those who drink warm water.
201 exam-style questions on OCR A Level Psychology Planning and conducting research. Each one has a worked solution and a mark scheme showing where the marks go.