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When you are looking for a simple measure of the spread of the data, but one which is protected from the effects of extreme values (outliers).

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Q: When to use quartile deviation?
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Related questions

What is coefficient of quartile deviation?

What is coefficient of quartile deviation?


What is the use of quartile deviation?

* * 4-22


Quartile deviation advantages disadvantages?

advantages of quartile deviation


Relation between quartile deviation and mean deviation?

mean deviation =(4/5)quartile deviation


What is mean deviation and why is quartile deviation better than mean deviation?

What is mean deviation and why is quartile deviation better than mean deviation?


What is the purpose of quartile deviation?

In a data sample, the purpose of quartile deviation is a way to measure data dispersion instead of using the range. The quartile deviation is found by subtracting the lower quartile from the upper quartile, and dividing this result by two.


What is the formula for coefficient of quartile deviation?

coefficient of quartile deviation: (Q3-Q1)/(Q3+Q1)


What is quartile deviational?

Quartile Deviation (QD)The quartile deviation is half the difference between the upper and lower quartiles in a distribution. It is a measure of the spread through the middle half of a distribution. It can be useful because it is not influenced by extremely high or extremely low scores. Quartile Deviation is an ordinal statistic and is most often used in conjunction with the median.why we calculating quartile deviation?


If q1q2q3 are three quartiles then Coefficent of quartile deviation is?

coefficient of quartile deviation is = (q3-q1)/(q3+q1)


Is the ratio of quartile deviation to mean deviation is raw?

yes


Example of quartile deviation?

7,8,9 q.d?


Formula of quartile deviation?

Q3-q1