Question

if the first quartile q1=15 and third quartile q3= 25 the coefficient of​

Answer 1

Step-by-step explanation:

The coeff of quartile deviation is defined like this:

Qd = (difference between Q₁ and Q₃)/(sum of Q₁ and Q₃)

So in your example Qd = (25 - 15)/(25 + 15) = 10/40

So Qd = 1/4

Answer 2

The coefficient of quartile deviation = 0.25

Given :

First quartile Q₁ = 15 and third quartile Q₃ = 25

To find :

The coefficient of quartile deviation

Solution :

Step 1 of 2 :

Write down the given quartile

By the given

First quartile = Q₁ = 15

Third quartile = Q₃ = 25

Step 2 of 2 :

Find coefficient of quartile deviation

The coefficient of quartile deviation

$\displaystyle \sf{ = \frac{Q_3 -Q_1 }{Q_3 + Q_1} }$

$\displaystyle \sf{ = \frac{25 - 15 }{25 + 15} }$

$\displaystyle \sf{ = \frac{10 }{40} }$

$\displaystyle \sf{ = \frac{1 }{4} }$

$\displaystyle \sf{ = 0.25 }$

Correct question : if the first quartile Q₁ = 15 and third quartile Q₃ = 25 then coefficient of quartile deviation is

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