Descriptive statistics
Covered in practiceCentre, spread, visualization, and transformations.
What to look for
- Check denominator, scale, and outliers first.
EXAM KNOWLEDGE MAP
Break the scope into locatable knowledge areas, then return each error to its concept and decision steps.
Original items train the published ability scope. Practice scores are not official scores, and official samples are not copied.
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QUICK REFERENCE
Keep the exam's scattered terms on one compact index. Scan the names first, then open only the items whose meaning or decision point needs a check.
SYLLABUS AT A GLANCE
Centre, spread, visualization, and transformations.
Conditional probability, expectation, and common distributions.
Point estimates, intervals, and sampling distributions.
Null hypotheses, significance, errors, and power.
Least squares, residuals, interpretation, and group comparisons.
OFFICIAL REFERENCE