IB Math AA SL Unit 4: Statistics & Probability

IB Maths AA SL Unit 4: Statistics and Probability, topic by topic

Each topic in this unit has a free page with step-by-step worked examples and the key formulas, then exam-style questions with mark schemes.

• Bivariate Data and Correlation questions49 questions · 3 worked examples
• Discrete Random Variables questions50 questions · 3 worked examples
• Measures of Central Tendency questions24 questions · 3 worked examples
• Normal Distribution questions41 questions · 3 worked examples
• Presentation of Data questions43 questions · 3 worked examples
• Probability questions72 questions · 3 worked examples

Learn it first: AA SL Unit 4 notes

• Mean, median, mode, and IQR
• Binomial distribution

Where marks go in AA SL Unit 4

From the IB subject reports we summarise on AA SL Examiner Insights, in our own words:

• Probability: assuming independence, and conditional probability with complements. Only multiply when independence is given or proved. Find P(A ∩ B) from the addition rule or a Venn diagram, then use P(A | B) = P(A ∩ B)/P(B), writing the events in context.
• Binomial and normal: "at least", inequalities, rounding bounds and which distribution. Write the distribution and the probability statement first (X ~ B(n, p), P(X ≥ 1) = 1 − P(X = 0)). Dividing by ln of a number below 1 reverses the inequality. For a measurement to the nearest 0.1, use the interval from −0.05 to +0.05. Solve for μ and σ on the GDC.

The questions here are original, written in the style of IB papers with IB-style mark schemes; for real papers see the IB Maths AA SL past papers page.

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