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Percentiles and Quartiles

High School Math based on the topics required for the Regents Exam conducted by NYSED.

 

 

Percentiles Quartiles and Deciles

 

 

Median, upper and lower quartiles, maximum and minimum.

 

 

Quartiles and Percentiles
Errata: P25= 25/100 x 31 =7.75 rounds to 8 (Not 18) and the 8th number in the list of data is 9, therefore Quartile 1 is P25 = 9

 

 

How to Calculate Percentiles
Percentiles are calculated by treating numbers as a portion of 100.

 

 

 

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