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Unit 4: Data & Probability

Collecting, displaying, and analysing data. Understanding chance, probability, and how to make fair comparisons.

20 Lessons 3 Checkpoints 1 Unit Quiz

Data Collection and Display

Lessons 1-7
1
Collecting Data
Surveys, questionnaires, and choosing the right sample.
2
Types of Data
Categorical vs numerical, discrete vs continuous.
3
Frequency Tables
Organising raw data into a clear summary.
4
Dot Plots and Stem-and-Leaf
Simple ways to show every data value.
5
Bar Charts and Pie Charts
Visualising categorical data with bars and sectors.
6
Line Graphs
Tracking change over time with connected points.
7
Histograms
Grouping continuous data into intervals.
Checkpoint 1
CP1
Checkpoint 1
Lessons 1-7 - 8 multiple choice questions.

Analysing Data

Lessons 8-13
8
Mean (Average)
The most common measure of centre.
9
Median and Mode
Two more ways to find the centre of a data set.
10
Range and Outliers
Measuring spread and spotting unusual values.
11
Comparing Data Sets
Using statistics to compare two groups fairly.
12
Two-Way Tables
Showing two variables at once.
13
Misleading Graphs
Spotting tricks that distort the truth.
Checkpoint 2
CP2
Checkpoint 2
Lessons 8-13 - 8 multiple choice questions.

Probability

Lessons 14-20
14
Introduction to Probability
Measuring how likely something is to happen.
15
The Probability Scale
From impossible to certain.
16
Sample Space
Listing every possible outcome.
17
Venn Diagrams
Visualising overlapping events.
18
Tree Diagrams
Mapping out combined probabilities step by step.
19
Experimental Probability
What actually happens vs what should happen.
20
Probability Review
Bringing it all together.
Checkpoint 3
CP3
Checkpoint 3
Lessons 14-20 - 8 multiple choice questions.
Unit Quiz
QZ
Unit 4 Quiz
All 20 lessons - 15 multiple choice + 5 short answer questions.
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