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