Read change through time without treating a missing observation as zero.
Skills resources are shared. Check your qualification page for its specific assessment conditions.
Time series and missing observations
The same river level threshold is used throughout. One annual record is missing. Line segments only connect consecutive observed years; no zero or interpolated observation has been inserted.
Scroll the diagram sideways to see the full resource.
Year
Days above the fixed level
2018
29
2019
36
2020
25
2021
38
2022
Missing
2023
33
2024
26
2025
31
Fictional annual river record. Original fictional resource; not an official map or real dataset.
Resource description
Exact observations: 2018: 29 days; 2019: 36 days; 2020: 25 days; 2021: 38 days; 2022: missing days; 2023: 33 days; 2024: 26 days; 2025: 31 days. The line is deliberately broken at the missing year.
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.