Probability & Statistics

Averages and Spread

The Three Averages Mean — Add all values, divide by how many there are. Median — The middle value when data is in order. For an even number of values,...

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Probability (Single Event)

What is Probability? Probability measures how likely an event is to happen, on a scale from 0 to 1: - 0 = Impossible - 1 = Certain - Values in between...

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Combined Probability and Tree Diagrams

Combined Events When two or more events happen, we can find probabilities using: - AND (both events) → multiply probabilities - OR (either event) → ad...

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Cumulative Frequency and Box Plots

Cumulative Frequency Cumulative frequency is a running total of frequencies. It tells you how many values are less than or equal to a given value. | C...

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Scatter Graphs and Correlation

A scatter graph shows the relationship between two variables by plotting pairs of values as points. Types of Correlation | Type | Pattern | Example |...

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Histograms H

A histogram displays continuous data with bars where area represents frequency, not height. This makes histograms different from bar charts. Why Histo...