digraph G {
	rankdir=TB;
	node [fontsize=12, shape=rectangle, style=filled];
        edge [penwidth=2, fontsize=10 ];


	data[label="type of data?"];
	IR[label="data normal distributed\nor n large?"];
	ordinal[label="?"];
	nominal[label="?"];
			 
	data->IR[label="interval/ratio"]
	data->nominal[label="nominal/discrete"]
	data->ordinal[label="ordinal"]
}