Quartile Deviation

It is useful for students

1. College of Education, Canal Road, Jammu
Name: Mamta Saini
Section:A
Rollno:51
Presentation: Psychology
Topic: Calculation of quartile deviation

2. ➢Topic - Calculation of quartile deviation

3. Meaning of Quartile Deviation
▪Th? Quatil? Deviatio ca b? define? mathematicall? a
half of th? di?erenc? betwee th? uppe an? lowe quatil?.
▪Her?, quatil? deviatio ca b? represente? a QD;Q3
denote th? uppe quatil? an? Q 1 indicate th? lowe
quatil?.
▪Quatil? Deviatio i als know a th? sem -interquatit?
rang?
▪FORMULA:QD=(Q3-Q1)/2
▪.

4. Merits & demerits of quartile Deviation
Merits
❑I i eas t eas t
understan an comput.
❑Minimu effec of trem
value
❑I i no effecte b th trem
score
❑Applicabl for ope en clas
distributio
❑Better tha Rang
Demerits
❑No Base o al value
❑Formatio of Serie no know
❑Instabilit
❑I i no suitabl t algebrai
treatmen
❑No reliabl measur of
dispersio.I i affecte b
fluctuation i samplin.

5. Calculation of quartile deviation & coefficient
deviation for different types of statistical series
<Individual Series and Quartile Deviation
<Discrete Series or frequency array& quartile
deviation
<Frequency distribution series & Quartile
Deviation

6. Illustration::1

7. Illustration::2

8. ❖Illustration::3

9. Thanks you

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