Confused by Quartile Calculation? Get Help Here!

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SUMMARY

The discussion centers on the calculation of quartiles using a specific data set. The user correctly identifies Q1 and Q2 as 15 and 16, respectively, but struggles with calculating the upper quartile (Q3). The correct upper quartile should be 16.5, derived from the average of the fifth and sixth items in the ordered data set, which are 17 and 16. This highlights the importance of understanding the method for calculating quartiles in a data set.

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  • Understanding of quartile calculation methods
  • Familiarity with data set ordering
  • Basic statistical concepts
  • Knowledge of averaging techniques
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  • Learn about data set ordering and its impact on statistical measures
  • Explore advanced statistical concepts such as interquartile range
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Statisticians, data analysts, students learning statistics, and anyone involved in data analysis requiring accurate quartile calculations.

ojsimon
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Normally this is a very easy task, but i just can't get this one right.

the data set is 14
14
14
15
15
15
15
15
15
16
16
16
16
16
16
17
17
17
18
25

And i get Q1 and Q2 right at 15 and 16, but i keep getting the upper quartile as 17, when it is meant to be 16.5. Can anyone help me as to how to get this answer?

Thanks
 
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You have 20 items. The upper quartile is between the fifth and sixth item counting from the top. These are 17 and 16 respectively.
 

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