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Measures of central tendency, spread, regression, correlation and interpreting statistical data.
Watch the full lesson before attempting practice questions.
Master these ideas before attempting exam questions.
Mean, median, and mode. Understand how outliers affect each measure differently.
Range, IQR, variance and standard deviation. Larger spread = more variability in data.
Shows Q1, Q2 (median), Q3, min and max. Identifies outliers and spread visually.
Plot bivariate data. Use the least-squares regression line: ŷ = a + bx.
r measures the strength and direction of a linear relationship. −1 ≤ r ≤ 1.
Commit these to memory — they appear in almost every exam.
These are your learning targets for Statistics.
Avoid these errors — they cost marks every year.
The regression line of y on x minimises vertical distances, not horizontal.
The box shows the IQR (Q1 to Q3). The median is the line inside the box.
Predictions within the data range are reliable; outside the range may be unreliable.
Request CAPS-aligned study materials for Statistics.
Comprehensive CAPS-aligned notes covering all key concepts, theorems, and worked examples for Statistics.
NSC-style exam questions with full memorandum. Ideal for timed practice and self-assessment before exams.
Graded practice questions organised by difficulty. Perfect for building confidence before Paper 2.
Straight answers to common Grade 12 CAPS questions about Statistics.
Statistics in Grade 12 CAPS covers data handling, measures of central tendency, spread, box-and-whisker plots, histograms, ogives, and interpreting information from graphs and tables.
Practise reading graphs carefully, learn the definitions of each statistical measure, and show your calculations clearly. Accuracy matters because one small reading mistake can affect the whole answer.
Common mistakes include reading the wrong class interval, confusing mean, median, and mode, and interpreting graphs too quickly. Learners also lose marks when they do not state conclusions clearly.
CAPS exams often test graph interpretation, summary statistics, and reasoning from real-world data. These questions usually appear in Paper 2 and reward careful reading and clear explanations.
Book a focused session with Chris Khomo and work through this topic step by step — at your own pace, online, from anywhere in South Africa.