We have, total frequency, N = 400
N/2 = 400/2 = 200
Observe, cf = 216 is just greater than 200.
Thus, median class = 3000-3500
Median is given by
L = Lower class limit of median class = 3000
N/2 = 200
cf = cumulative frequency of the class preceding median class = 130
f = frequency of the median class = 86
h = class interval of the median class = 500
Substituting these values in the formula of median, we get
⇒ Median = 3000 + 406.98
⇒ Median = 3406.98
Thus, the median is 3406.98 hours.
Rate this question :