UPSC CDS Math Statistics Questions

Arrange the data in an ascending order. 2,2,2,2,7,7,7,7,7
Here, number of observations = 8 (Even)
Therefore, Median
=

4th observation + 5th observation

2

=

2+7

2

=

9

2

=4.5
=

36

8

=4.5
Hence, statement 1 is correct
Mode is the value that occurs most often. In the given data, both 2 and 7 occur four times. So, the mode isboth 2 and 7.
Hence, statement 2 is correct.