Find the lower quartile, upper quartile and inter quartile range for the date `19,17,13,7`

Find the lower quartile, upper quartile and inter quartile range for the date: 9,11,15,19,17,13,7

Quartiles

If the mean of the lower quartile and upper quartile is 10 and the semi-interquartile range is 5 , then the lower quartile and the upper quartile are "______" and "_______" .

Lower quartile , upper quartile and interquartile range are Q_(1) , Q_(3) and Q . If the average of Q , Q_(1) and Q_(3) is 40 and semi-interquartile range is 6 , then find the lower quartile .

Find semi-inter quartile range of the following data :

For the data given the inter-quartile range is

The weights of 60 boys are given in the following distribution table:Find (i) Median (ii) Lower quartile (iii) Upper quartile (iv) Inter quartile range