The daily wages (in rupees) of 19 workers are :

41, 21, 38, 27, 31, 45, 23, 26, 29, 30, 28, 25, 35, 42, 47, 53, 29, 31, 35.

Find :

(i) the median

(ii) lower quartile

(iii) upper quartile

(iv) inter quartile range

From the following frequency distribution, find :

(i) the median

(ii) lower quartile

(iii) upper quartile

(iv) inter quartile range

Find the mode of the following sets of numbers :

(i) 5, 7, 6, 8, 9, 0, 6, 8, 1, 8

(ii) 9, 0, 2, 8, 5, 3, 5, 4, 1, 5, 2, 7

Find the mean, median and mode of the following distribution :

8, 10, 7, 6, 10, 11, 6, 13, 10.