Question

28. The percentage of marks obtained by 100 students are given below,
Marks 30-36 35-40 40-45 45-50 50-55 55-60 60-65.
frequency 14 16 18 23 18 8 3
Determine the median percentage of marks
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Answer 1

sol:-. arrange the given data in ascending order

3, 8, 14, 16, 18, 18, 23

Number of observations (n) = 7 which is odd

if number of observations is odd then

(n+1/2) observation

7+1/2=4th observation

therefore median = 16