Question

find the median score in mathematics test (out of 25) of 15 students who scores are as follows: 19 ,25, 23 ,20 ,15 ,10, 5 ,16 25, 20 ,24 ,25 ,25​

Answer 1

Median=middle no (ascending order)
5, 10, 15, 16, 19, 20, 20, 23, 24, 25, 25, 25, 25
20 is the median

Answer 2

given data :- 19 , 25 , 23 , 20 , 15 , 10 , 5 , 16 , 25, 20 , 24 , 25 , 25​

first of all, we've to write the data in ascending order (u can also write in descending order)

in ascending order = 5, 10, 15, 16, 19, 20, 20, 23, 24, 25, 25, 25, 25

n = 13 (odd)

so we'll use this formula :- (n + 1)/2^th term

= (13 + 1)/2^th term

= 14/2^th term

= 7th term

the seventh term is 5, 10, 15, 16, 19, 20, 20, 23, 24, 25, 25, 25, 25

hence, it's median is 20.