The diagram shows a located bar chart made from an environmental quality survey in a city-centre square. Students scored litter, graffiti and noise at three...
Question 1 Report
The diagram shows a located bar chart made from an environmental quality survey in a city-centre square. Students scored litter, graffiti and noise at three points. The bars are placed at their survey locations rather than in a conventional graph. This presentation lets readers see the data pattern on the map, although exact comparisons can be more difficult when symbols overlap.
(a) State the point, A or B, with the higher bar shown in Fig. 1. [1]
(b) Suggest one advantage of locating bars on a map rather than showing them in a separate chart. [2]
A class is planning a fieldwork enquiry into access to green space in a rapidly growing suburb. They have a base map, a list of public parks and permission to survey residents outside a library. The teacher asks them to consider how the method could exclude some groups, including people who do not visit the library. No figure is provided because students must evaluate the proposed study design before collecting data.
(a) State one group that may be under-represented by surveying only outside the library. [1]
(b) Explain why using more than one survey location could improve the validity of the enquiry. [2]
Answer Details
Located bar chart
- (a) Point A has the higher bar shown. [1]
- (b) Locating bars on a map shows where each environmental-quality score was collected. This makes spatial relationships and patterns, such as variation across the square, easier to identify. [2]
Green-space questionnaire
- (a) People who do not use the library may be under-represented. Housebound residents, commuters and young children are also valid examples. [1]
- (b) More survey locations reach a wider range of residents. Therefore, the results are less shaped by the particular characteristics of people at one location and are more representative, improving validity. [2]
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