IP AMaths Notes (Upper Sec, Year 3-4): 20) Statistics — Standard Deviation

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08 Nov 2025, 00:00 Z

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Marcus Pang·Managing Director (Maths)

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Q: What does IP AMaths Notes (Upper Sec, Year 3-4): 20) Statistics - Standard Deviation cover?
A: Compute mean, variance, and standard deviation for raw and grouped data in IP AMaths.

Standard deviation quantifies spread. Handle both raw datasets and grouped frequencies.

Keep the full topic roadmap handy via our IP Maths tuition hub so you can jump into related drills, quizzes, or diagnostics as you move through these notes.

These statistics tools align with SEAB GCE O-Level Additional Mathematics (4049): population mean/variance/standard deviation for raw and grouped data using class midpoints.

Status: SEAB O-Level Additional Mathematics 4049 syllabus (exams from 2025) checked 2025-11-30 - scope unchanged; remains the reference for this note.

Formulae

Mean: $\bar{x} = \dfrac{\sum x}{n}$

IP AMaths Notes (Upper Sec, Year 3-4): 20) Statistics — Standard Deviation

Formulae

Worked example 1 - Raw data

Worked example 2 - Grouped data

Worked example 3 - Frequency table with repeated values

Practice Quiz

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