Students in Bangkok, Thailand investigated differences between two shopping centres in the north of the city. Central Ladprao Plaza is a larger shopping centre than La Villa and they are about 5 km apart. One group of students wanted to find out if there were differences between the shops and services in the two centres, and the different reasons people went to them. They decided to test the following hypotheses: Hypothesis 1: There are differences between the numbers of high-, middle- and low-order shops and services in Central Ladprao Plaza and in La Villa. Hypothesis 2: The main reasons for people going to shop in Central Ladprao Plaza and La Villa vary in importance.

Mark scheme

Marking points from the official mark scheme (May/June 2018). The mark or mark type is shown in brackets.

1. [1] 7(a) How often they are bought (High): Infrequently / not often / low / rarely; (Low): frequently / often / high.
2. [1] 7(a) Average price of goods (High): high / expensive / maximum; (Low): low / cheap / small.
3. [1] 7(a) Distance people are willing to travel (High): further / long / far / maximum / large; (Low): short / less / not far / close / small.
4. [1] 7(b)(i) Two dividing lines at 7 and 20 from left.
5. [1] 7(b)(i) Third dividing line at 45 from left.
6. [1] 7(b)(i) Shading in correct order from left.
7. [1] 7(b)(ii) Yes / hypothesis is TRUE – 1 mark reserve.
8. [1] 7(b)(ii) High order – greater numbers in Central Ladprao Plaza (1) with 114:7 (1).
9. [1] 7(b)(ii) Medium order – greater numbers in Central Ladprao Plaza (1) with 173:13 (1).
10. [1] 7(b)(ii) Low order – greater numbers in Central Ladprao Plaza (1) with 88:25 (1).
11. [2] 7(b)(ii) Allow 2 max if make a general statement e.g. more high, medium, low order in CLP. Can accept refs to 'only' for statement mark; Can compare numbers between orders in both centres; e.g. Most / biggest number in CLP are middle order but largest in LV is low order (1) with 173 in CLP and 25 in LV (1); Credit 1 mark MAX / RESERVE for paired data comparing the two shopping centres.
12. [1] 7(c)(i) Choose a variety of people / choose people of different age / gender / types / adults only.
13. [1] 7(c)(i) Decide on sample size / how long to ask people for.
14. [1] 7(c)(i) Don't ask people you know.
15. [1] 7(c)(i) Introduce yourself / explain purpose of survey.
16. [1] 7(c)(i) Have a system for choosing people such as every 10th person / random / have a sampling method.
17. [1] 7(c)(i) Accept if people don't want to answer / too busy / or fill it in / don't argue / be polite / thank them.
18. [1] 7(c)(i) Don't approach people in a big group / work in pairs or groups / don't work alone.
19. [1] 7(c)(i) Don't block pavements / doorways.
20. [1] 7(c)(i) Go to different parts of shopping area / don't all go to the same area.
21. [1] 7(c)(ii) One dividing line at 80% clockwise from 0%.
22. [1] 7(c)(ii) 1st largest slice (35–80) shaded Near home; 2nd smaller slice (80–0) shaded Good value for money. MUST USE SHADING FROM KEY.
23. [1] 7(c)(iii) Hypothesis is TRUE – 1 mark reserve.
24. [1] 7(c)(iii) Main / most top reason for shopping at each centre is different / top two reasons are different.
25. [1] 7(c)(iii) 'Large variety' is top reason in Central Ladprao Plaza but 'near home' is top in La Villa.
26. [1] 7(c)(iii) 'Near work' 2nd reason in CLP but 'good value for money' 2nd reason in LV.
27. [1] 7(c)(iii) Credit paired data to show difference to 1 mark MAX / RESERVE.
28. [1] 7(c)(iii) 'Large variety' is 35% in Central Ladprao Plaza but 'near home' 45% in La Villa.
29. [1] 7(c)(iii) 'Near work' is 22% in CLP but 'good value for money' is 20% in LV.
30. [1] 7(c)(iii) Credit grouped data for top two reasons e.g. 57% in CLP and 65% in LV.
31. [1] 7(d)(i) Plot bar for 7 cars at La Villa on Fig. 7.6.
32. [1] 7(d)(ii) Car is most popular in Central Ladprao Plaza but monorail is most popular in La Villa.
33. [1] 7(d)(ii) Underground train is popular in CLP but not used in LV.
34. [1] 7(d)(ii) 0 / nobody uses monorail in CLP but 20 people use it in LV.
35. [1] 7(d)(iii) Distance to travel / from home to shopping centre.
36. [1] 7(d)(iii) How long to travel to shopping centre / which method is faster.
37. [1] 7(d)(iii) Likely duration of visit / how long shoppers stay.
38. [1] 7(d)(iii) What / how much they are buying.
39. [1] 7(d)(iii) Availability of regular bus service / underground train / monorail / car park / pedestrian precinct / cycles.
40. [1] 7(d)(iii) Cost of car parking.
41. [1] 7(d)(iii) Weather conditions / weather forecast / likely to travel by car if raining.
42. [1] 7(d)(iii) Cost of travel / do shoppers own a car / can shoppers afford car / car sharing / can shopper afford petrol or bus fare.
43. [1] 7(d)(iii) Traffic congestion / amount of traffic.
44. [1] 7(d)(iii) How much time they have to shop.
45. [1] 7(d)(iii) Risk of crime / safer to drive / prefer privacy / independence.
46. [1] 7(d)(iii) Time of day.
47. [1] 7(e)(i) Area served by a town or service.
48. [1] 7(e)(ii) Must refer to use of the data obtained.
49. [1] 7(e)(ii) Put results of questions in tables.
50. [1] 7(e)(ii) Locate two shopping centres on 1 or 2 maps.
51. [1] 7(e)(ii) Locate districts of Bangkok on a map.
52. [1] 7(e)(ii) Decide on a key for dividing numbers into groups.
53. [1] 7(e)(ii) Choropleth shading to show number of people from each district.
54. [1] 7(e)(ii) Plot lines on map to show distances to each district.
55. [1] 7(e)(ii) Draw a line / frame around furthest distances to show sphere of influence.
56. [1] 7(e)(ii) Calculate range / average distance.
57. [1] 7(e)(ii) Work out maximum distance travelled.