oxford cambridge and rsa friday 9 june 2017 – afternoon · fig. 2 a spearman’s rank calculation...
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Friday 9 June 2017 – AfternoonA2 GCE GEOGRAPHYF764/01/I Geographical Skills
INSERT
Duration: 1 hour 30 minutes
Oxford Cambridge and RSA
OCR is an exempt CharityTurn over
© OCR 2017 [R/500/8459]DC (SC/FC) 138538/2
2
F764/01/I Jun17© OCR 2017
Fig. 1 A sketch map drawn by a student investigating infiltration rates on different rock types.
Planned sample points
54
7
26 MillstoneGrit
3
1
Malham
BowlandShale
BowlandShale
Limestone
CravenFault
CravenFault
ReefKnollReefKnoll
3
F764/01/I Jun17 Turn over© OCR 2017
Fig. 2 A Spearman’s Rank calculation used in a beach investigation
Rank of distance along the beach: West to East
Rank of pebble size: 1 = smallest
Difference in rank Square of difference
1 7 6 362 8 6 363 6 3 94 5 1 15 10 5 256 9 3 97 4 −3 98 2 −6 369 3 −6 36
10 1 9 81R 278
Rs = 1− n n6 dR
3
2
- where n = 10
Rs = 1− 990
6 278#
Rs = − 0.68
20.2
0.4 1%
5%
0.6
0.8
1.0
4 6Degrees of freedom (number of pairs –2)
Sign
ifica
nce
leve
l
Spea
rman
r va
lue (
+ or
–)
8 10 11 12
not significant
not significant
4
F764/01/I Jun17© OCR 2017
Oxford Cambridge and RSA
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Fig. 3 A graph to present data collected in an investigation into urban traffic congestion
Traffic volume 8am to 8pm
8am0
20
40
60
80
100
120
140
160
Number ofvehicles
180
200
9 10 11 12pm 1 2
Times of survey
3 4 5 6 7 8pm
cars
vans
Survey: Aston Expressway. Vehicles per five minutes