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Quartiles in Groups

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Quartiles in Groups

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About this activity

Estimate a key percentile from grouped data.

Created by

Marvi Aben Bitarra
Marvi Aben Bitarra
Philippines

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Quartiles in Groups
 

Quartiles in GroupsOnline version

Estimate a key percentile from grouped data.

by Marvi Aben Bitarra
1

I mark the value below which a quarter of the data fall, estimable from a frequency table without listing every score.

Hints

Involves lower class boundary, cumulative frequency before the class, the class frequency, and the class width.

Calculated from grouped data using interpolation within the class containing N/4.

Represents the 25th percentile.

 
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