Hey Haya,
To find the range in which most values are present, you can use the histcount() function: https://www.mathworks.com/help/matlab/ref/histcounts.html
[n,e] = histcounts(A);
This will partitions the A values into bins(ranges), and returns the count in each bin(n), as well as the bin edges(e).
So the maximum values will be present in the range:
[maxn,i] = max(n);
range = [e(i), e(i+1)];
In this case it will be (0,1)
To find the average of only these values:
x = A >= range(1) & A<= range(2); % or > and < instead of >= and <=
result = mean(A(x));
