The cumulative distribution below shows the weekly wages of 50 workers in a factory.
a. Wages less than (Rs) : 400 | 600 | 800 | 1000 | 1200
Cumulative frequency : 12 | 25 | 37 | 45 | 50
b. (i) Convert the above data into a simple (class–wise) frequency distribution using equal class width.
c. (ii) Using your table, calculate the mean weekly wage of the workers.