Displaying Grouped Data
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Transcript of Displaying Grouped Data
Displaying Grouped Data
Grouped?
When the data gets bunched together (normally because theres a bigger range which makes analysis easier)
grouped
ungrouped
This is a frequency distribution table for grouped data
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
Class Intervals
Its all about splitting up your data
Its all about splitting up your data
in a way to avoid bias or skew
Its all about splitting up your data
in a way to avoid bias or skew
this usually means
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)
H i s t o g r a m s a n d P o l y g o n s
H i s t o g r a m s a n d P o l y g o n s
Exactly the same as normal histograms and polygons
Except the class centre goes on the bottom of the column
Whassup?