Find the median for the following frequency distribution
marks : 0-10 10-20 20-30 30-40 40-50 50-60
no of students 3 15 7 11 29 16 9
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Answer:
class interval no. of student cf
0-10 3 3
10-20 15 18
20-30 7 25
30-40 11 36
40-50 29 65
50-60 16 81
60-70 9 90
total 90
median = l + (n/2 - cf )/f
median class = 40-50
= 40 + (45-36) /29
43.1
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