The quartile deviation of daily wages (in Rs. | vedclass

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(D) The given data in ascending order of magnitude is $7, 10, 12, 15, 17, 19, 25$.Here,the number of observations $n = 7$.${Q_1} = 	ext{size of } \le

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$4.5$

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(D) The given data in ascending order of magnitude is $7, 10, 12, 15, 17, 19, 25$.Here,the number of observations $n = 7$.${Q_1} = 	ext{size of } \left( \frac{n + 1}{4} ight)^{th} 	ext{ item} = 	ext{size of } \left( \frac{7 + 1}{4} ight)^{th} 	ext{ item} = 	ext{size of } 2^{nd} 	ext{ item} = 10$.${Q_3} = 	ext{size of } \left( \frac{3(n + 1)}{4} ight)^{th} 	ext{ item} = 	ext{size of } \left( \frac{3(8)}{4} ight)^{th} 	ext{ item} = 	ext{size of } 6^{th} 	ext{ item} = 19$.Quartile Deviation $(Q.D.) = \frac{Q_3 - Q_1}{2} = \frac{19 - 10}{2} = \frac{9}{2} = 4.5$.

The quartile deviation of daily wages (in $Rs.$) of $7$ persons given below $12, 7, 15, 10, 17, 19, 25$ is

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