Question

If 25%of the scored in a distribution is less than the score 10and 25%is more than the score 40.Find out the quartile deviation of the distribution.

Answer 1

Quartile deviation of the distribution is 15

Explanation:

Given that 25% of the scored in a distribution is less than the score 10.

Its means that first quartile is (Q₁)10.

And 25% is more than the score 40.

It means that third quartile is(Q₃) 40.

Quartile deviation $=\frac{Q_3-Q_1}{2}$

                                     $=\frac{40-10}{2}$

                                     =15