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Question

Find the quartile deviation of the data given below.

7, 3, 6, 4, 2, 11, 7
  1. 1
  2. 2
  3. 3
  4. 4


Solution

The correct option is B 2
Arrange the data in ascending order.

2, 3, 4, 6, 7, 7, 11

Here, N=7

Q1=Size of (N+14)th observation=Size of 2nd observation=3

Q3=Size of 3(N+14)th observation=Size of 6th observation=7

Quartile Deviation=Q3Q12=732=2

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