Question

(3) Find the median and mode of the following observation:

18, 14, 20, 12, 20, 15, 20, 16, 17.

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Answer 1

Answer:

Arranging data in ascending order,

12,14,15,16,17,18,20,20,20

Number of observations =9 (odd)

Median=(n+1)/2

=(9+1)/2

=10/2

=5th term

=17

Since,20 appears the most number of times

So, Mode=20

Answer 2

first we write in sequence

12,14,15,16,17,18,20,20,20

Step-by-step explanation:

Mode = 20

Median = 17