Rank two independent samples, including tied observations.
Skills resources are shared. Check your qualification page for its specific assessment conditions.
Mann–Whitney U
Row alignment is only for compact display: these are independent observations, not paired measurements. Pool and rank all eight values, averaging tied ranks. Define UA = RA − nA(nA + 1)/2, UB = nA nB − UA. Report the smaller U. Comparing medians additionally requires compatible distribution shapes.
Observation label
Independent site group A
Independent site group B
1
9
8
2
11
11
3
11
16
4
15
18
Fictional vegetation height observations (cm) All values are synthetic.
Resource description
Fictional vegetation height observations (cm)
Use the resource carefully
State the unit and the part of the resource you used. A pattern in a fictional dataset is evidence for that exercise; it does not establish a fact about a real place.
Check whether an explanation is supported by the data or needs additional geographical knowledge. For statistical tasks, a calculated result does not establish causation or significance by itself.