Question

calculate lower and upper quartiles, when quartile deviation =10 and co-efficient of quartile deviation=0.5​

Answer 1

Answer:

Q1= 10, Q3= 30

Explanation:

QD = (Q3-Q1) /2 = 10

Q3 -Q1 = 20 -----(1)

coefficient of QD = (Q3-Q1) /(Q3+Q1 ) = 0.5

Q3 +Q1 = 20/0.5= 40 ------(2)

(1) + (2)

Q3-Q1+Q3+ Q1 = 20+40

2 Q3 = 60

Q3= 30 ----(3)

put (3) in (2)

Q1 = 40 - Q3

Q1 = 40- 30

Q1 = 10

hope it helps.