Answer
$y ̅ =293.8$
$y ̃=283$
Work Step by Step
$y ̅ =\frac{∑y_i}{n}=\frac{366+327+274+292+274+230}{5}=\frac{100}{5}=293.8$
Position of the median:
$0.5(n+1)=0.5(6+1)=3.5$
That is, for a sample of size 6, the median is mean between the values of the third and the fourth observations. In the given sample it is $\frac{274+292}{2}=283$.
