The following table shows classification of number of workers and the number of hours they work in a software company. Find the median of the number of hours they work.
Daily No. of hours Number of workers
8-10 : 150
10-12 : 500
12-14 : 300
14-16 : 50
Answers
Answer:
Median = 11.4
Step-by-step explanation:
Hours Mean frequency=f u = (Mean - 11)/2 u*f
8-10 9 150 - 1 -150
10-12 11 500 0 0
12-14 13 300 1 300
14-16 15 50 2 100
Total 1000 250
Mean = 11 + (250/1000) * 2
= 11 + 0.5
= 11.5
Find Median
Hours frequency=f cf
8-10 150 150
10-12 500 650
12-14 300 950
14-16 50 100
Median is 500
so lies in 10-12
Estimated Median = 10 + 2 * (1000/2) - 150 )/500
= 10 + 2 * 350/500
= 10 + 1.4
= 11.4