Descriptive Statistics and Data Presentation
Calculate, select, present, interpret and evaluate course-specified descriptive statistics.
How to study Higher Psychology
Build each answer from accurate psychological knowledge, named evidence, application to behaviour, analysis and justified evaluation.
Core concepts
Concept 1
mean, median and mode
Exam cue: Inspect data type, distribution and anomalies before choosing a statistic.
Concept 2
range
Exam cue: Show calculations and use accurate labels.
Concept 3
tables and graphs
Exam cue: State whether results support, refute or do not clearly resolve the hypothesis.
Concept 4
choice and justification of statistical procedure
Concept 5
interpretation in relation to a hypothesis
Risk pitfalls and guardrails
Using the mean for categorical responses.
Guardrail: Avoid deterministic claims, unsupported causation and generic evaluation disconnected from the named evidence.
Reporting a range without identifying maximum and minimum.
Guardrail: Follow the current task, template, BPS standards and centre controls; this guide does not author assessed work.
Claiming descriptive statistics establish significance or causation.
Guardrail: Avoid deterministic claims, unsupported causation and generic evaluation disconnected from the named evidence.
Memory anchors
Mean
Sum the scores and divide by the number of scores; it uses every value and is sensitive to extremes.
Median
The middle ordered score, or mean of the two middle scores.
Mode
The most frequent category or score.
Range
Maximum minus minimum; a simple measure of dispersion.
Appropriate display
Use a table and graph whose titles, axes, units and legend make the data interpretable.
Interpretation limit
Descriptive statistics summarise the sample; they do not by themselves prove a hypothesis or causal effect.
Checkpoint rule
Do the check-up only after you can summarize each concept in one sentence and identify one dangerous pitfall from memory.
Knowledge Check (after reading)
Short check-up to confirm understanding of this module.
Check-up Questions
For the scores 2, 4, 4, 6, what is the mean?
For the ordered scores 3, 5, 7, 11, what is the median?
Answer all questions to submit.
Next step personalized recommendations
Continue learning
Move forward only after this module is stable.
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