When selecting an appropriate statistical test for a study, a researcher must identify whether they are looking for a difference or a correlation, and the level of measurement of their data. Which of the following is the third key criterion required to select the correct statistical test?
Whether the hypothesis is directional (one-tailed) or non-directional (two-tailed)
Whether the experimental design is related or unrelated
Whether the significance level (α\alphaα) is set at 0.050.050.05 or 0.010.010.01
Whether the sample size (NNN) exceeds 30 participants
644 exam-style questions on OCR A Level Psychology Research methods and techniques. Each one has a worked solution and a mark scheme showing where the marks go.