A man with height of 170 cm is than a man with height of 155 cm.
The following table shows the distribution of the heights of a group of factory workers :
Ht. (cm):150−155155−160160−165165−170170−175175−180180−185No. of workers61218201386
(i) Determine the cumulative frequencies.
(ii) Draw the 'less than' cumulative frequency curve on graph paper. Use 2 cm = 5 cm height on one axis and 2 cm = 10workers on the other.