What are the demerits of quartile deviation?
(i) The calculation of quartile deviation is not based on all observations.
(ii) It is not possible to give it further algebraic treatment.
(iii) It is useful for measuring variations in open-end distributions.
(iv) It is very much affected by sampling fluctuations.
(i), (ii), (iii) and (iv)
(i), (iii) and (iv)
(iii) and (iv)
(i), (ii) and (iv)
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