Characteristics of Distributions, Dot Plots, and Stem Plots (VCE SSCE General Mathematics): Flashcards

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Characteristics of Distributions, Dot Plots, and Stem Plots
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Three main features describing distributions

Shape, centre, spread

Symmetric distribution definition

Creates mirror image when folded down the middle

Positively skewed distribution shape

Short tail on left, long tail extending to the right

Negatively skewed distribution shape

Short tail on right, long tail extending to the left

Centre (location) of a distribution

Where data values are typically positioned

Spread of a distribution

How variable or dispersed the data values are

When to use dot plots (dataset size)

Small datasets (n<30n < 30), discrete data

When to use stem plots (dataset size)

Small to medium datasets (n<50n < 50)

Stem in a stem plot

Leading digit or digits

Leaf in a stem plot

Final digit

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