MATLAB: Mean and median (difference)

meanmedian

Can you help me, please?

What is the difference between the mean and the median of a data set if there are only two values in it?

With only two values, there is no difference.

If the values come from a normal distribution, there is no difference.

If the values come from a unimodal distribution, without skew, then there is no difference.

From the documentation section More About:

The Kruskal-Wallis test is a nonparametric version of classical one-way ANOVA, and an extension of the Wilcoxon rank sum test to more than two groups. It compares the medians of the groups of data in x to determine if the samples come from the same population (or, equivalently, from different populations with the same distribution).

(Underline added.)

M=100;
data=(1:M).';
MeanData=data;
MedianData=data;
for k=1:M
MeanData(k)=mean(data(1:k));
MedianData(k)=median(data(1:k));
end