Comparing Data Sets (AQA GCSE Maths): Flashcards

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Comparing data sets
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What are the three aspects when comparing data sets?

Shape, average values, and spread

Location of median in a box plot

The line in the middle of the box

What larger spread in data indicates

Values are less consistent, showing more variation

Definition of range

Total spread from minimum to maximum

Definition of IQR

Spread of the middle 50% of data

Key limitation of box plots

Don't show number of data values in each group

Formula: Frequency from histogram

Frequency Density ×\times Class Width

Modal class in a histogram

Class with highest frequency density

What smaller range and IQR indicate

More consistent data with less variation

Formula: Mean from histogram

Total of f×xTotal frequency\frac{\text{Total of } f \times x}{\text{Total frequency}}

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