Question

Draw less than ogive .also calculate median....
Age no. Of employees
Below 24. 2
Below 30. 16
Below 36. 26
Below 42. 38
Below 48. 49
Below 54. 57
Below 60. 60

Answer 1

Lives in hours of is pieces are = 715, 724, 725, 710, 729, 745, 694, 699, 696, 712, 734, 728, 716, 705, 719

Arrange the above data in ascending order = 694, 696, 699, 705, 710, 712, 715, 716, 719, 721, 725, 728, 729, 734, 745

N = 15 (odd)

Median = (N+12)th terms

= (15+12)th terms = 8th terms = 716

Class interval (exclusive) Class interval  (inclusive) Class interval frequency Cumulative frequency

160 – 162 159.5 – 162.5 15 15

163 – 165 162.5 – 165.5 118 133 (F)

166 – 168 165.5 – 168.5 142 (f) 275

169 – 171 168.5 – 171.5 127 402

172 – 174 171.5 – 174.5 18 420

N = 420