Page 9 - Lesson note-5-Ch 14 Statistics ( Measure of Central Tendency)

Question 2:

Find the median of the following data:
15 , 6 , 16 , 8 , 22 , 21 , 9 , 18 , 25
Solution:
Arranging given numbers in ascending order
6 , 8 , 9 , 15 , 16 , 21 , 22 , 25

Question 3:

The marks of 15 students in an examination are
25, 19, 17, 24, 23, 29, 31, 4, 19, 20, 22, 26, 17, 25, 21.
Find the median score.

Solution:
By arranging the numbers in ascending order ,We get

17, 17, 19, 19, 20, 21, 22, 23, 24, 25, 26, 29, 31, 35, 40
Here n = 15 which is odd
Median = ½ (n + 1) th term
Median = ½ (15 + 1) th term
Median = value of the 8th term = 23