AS & A Level / Psychology / Data analysis and inference Question practice
Data analysis and inference About this practice Original, unofficial practice. Evaluative marking points are indicative: credit equivalent justified arguments, one point per distinct criterion, without double counting.
Accept equivalent valid methods and supported interpretations that address the task. Award each mark once; matching the model wording is not required.
Psychology Data analysis and inference
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1 Fictional recall scores are 4, 5, 5, 6 and 10 words. Calculate the mean and median and identify which is more affected by the highest score. Easy 3 marks Calculator + 2 Fictional survey: hours of social-media use correlate positively with reported loneliness. Explain why this alone does not establish that use causes loneliness. Easy 3 marks No calculator + 3 Fictional study: in 20 paired observations, 16 show improved scores, 2 worse scores and 2 ties. For a sign test discard ties and define S as the less frequent sign count. Calculate N and S. A supplied critical S is 4 at the chosen significance level; reject when S <= 4. State the decision and one limitation. Medium 4 marks Calculator + 4 Fictional independent-group result: mean scores are 18 and 14; both groups have standard deviation 5. Using d = (mean A - mean B)/5 for this equal-SD case, calculate d. Explain why the effect size alone does not show statistical significance or causation. Medium 4 marks Calculator + 5 Fictional case: researchers obtain p = 0.04 and announce a theory is 96% likely to be true. Evaluate this interpretation and the evidence needed for a stronger conclusion. Hard 4 marks No calculator + 6 Fictional case: a researcher tests many outcomes, reports only the significant one and calls the finding confirmatory. Evaluate the reliability of this evidence and propose improvements. Hard 4 marks No calculator + Self-assessed Not marked yet
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This is a self-study tool, not a certified answer key or a predicted AS & A Level grade.
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Original questions, not official past papers. Marking guidance is indicative, not an official answer key. Check your exam-board specification.
