Question

Find mean and median of the data 4, 2, 8, 11, 7, 1, 9

Answer 1

Ans

mean of the above ungrouped data is given as sum of observations /no of observations

=4+2+8+11+7+1+9}\7

=42/7=6

and median is ..

firstly arrange the above data in ascending order

1,2,4,7,8,9,11

as the number of observations is odd (7)

so it's median is given by

(n+1)th term divided by 2

where n=7

=(7+1)/2=4th term

=7(median)