Calculate the median for the following data.


Marks



20



9



25



50



40



80



Number of students



6



4



16



7



8



2


By arranging the data in table form,


Marks (x)



Number of students(f)



Cumulative frequency



9



4



4



20



6



10



25



16



26



40



8



34



50



7



41



80



2



43




N = 43




N = 43 (odd number)


Median = value of the term


=


Median is the marks of 22nd student as we know students from 11th to 26th got 25 marks.


So the median value of observations is 25.


10