Displaying Grouped Data

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Displaying Grouped Data

description

Displaying Grouped Data. grouped. ungrouped. G rouped? When the data gets bunched together (normally because theres a bigger range which makes analysis easier). This is a frequency distribution table for grouped data. This is a frequency distribution table for grouped data. - PowerPoint PPT Presentation

Transcript of Displaying Grouped Data

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Displaying Grouped Data

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Grouped?

When the data gets bunched together (normally because theres a bigger range which makes analysis easier)

grouped

ungrouped

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This is a frequency distribution table for grouped data

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This is a frequency distribution table for grouped data

Note that the “score” column has changed to the “class” column now

The “class centre” is the middle of the class

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Class Intervals

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Its all about splitting up your data

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Its all about splitting up your data

in a way to avoid bias or skew

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Its all about splitting up your data

in a way to avoid bias or skew

this usually means

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Its all about splitting up your data

in a way to avoid bias or skew

this usually means

picking your classes so that they have an equal number of scores in them (broken up evenly)

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H i s t o g r a m s a n d P o l y g o n s

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H i s t o g r a m s a n d P o l y g o n s

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Exactly the same as normal histograms and polygons

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Except the class centre goes on the bottom of the column

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Whassup?