October 2021 Paper 2 Q13

OCR ACurrent spec7 marksData Processing Large Data Set

13 The four pie charts illustrate the numbers of employees using different methods of travel in four Local Authorities in 2011.

Four pie charts for Local Authorities A, B, C and D with key: public transport (dark), private motorised transport (hatched), bicycle (dotted), all other methods of travel (light grey). A: mostly private, small bicycle and very small public. B: mostly private, large other, very small bicycle and public. C: mostly private, about a fifth public, tiny bicycle. D: half public, rest other, private and a small bicycle

(a) State, with reasons, which of the four Local Authorities is most likely to be a rural area with many hills. [2]

(b) Explain why pie charts are more suitable for answering part (a) than bar charts showing the same data. [1]

(i) State with a reason which two Local Authorities are likely to be urban. [2]

(ii) One urban Local Authority introduced a Park-and-Ride service in 2006. Users of this service drive to the edge of the urban area and then use buses to take them into the centre of the area. A student claims that a comparison of the corresponding pie charts for 2001 (not shown) and 2011 would enable them to identify which Local Authority this was.
State with a reason whether you agree with the student. [2]

Mark scheme (a)

Scheme	Marks
A: High private and low public OR B: Low bicycle and low public OR B: Low bicycle and high private OR C: Low bicycle and high private	B2
	[2]

Notes

Allow B1 for A or B or C with one correct factor only. Ignore else

All answers can be implied
Ignore all else

Mark scheme (b)

Scheme	Marks
Pie charts allow comparison of proportions Pie charts show proportions oe Ignore all else	B1
	[1]

Notes

NOT: Bar charts don’t show proportions unless also state pies do.
Assume “They” means pie charts.
NOT: It’s easier to compare data
Pie charts don’t easily show which is greatest
Allow percentages instead of proportions

Mark scheme (c)

Scheme	Marks
(i) C and D	B1
Larger (or high or most) proportion public transport Can be implied. Ignore all else	B1
	[2]
(ii) LDS says “The method of travel used is for the longest part, by distance, of the usual journey to work” Correct answers therefore should assume users of P&R will report only private, not public
Method of travel is the type used for the longest part of the journey	B1
Most people using Park-and-Ride would still say they were using private transport.	B1
	[2]

Notes

(c)(i)

B1: Both, no others

B1: Dep applied to at least one of C and D, even if other LA mentioned

B-marks are independent

(c)(ii)

B1: "Disagree" may be implied

B1: independent Ignore all else

Scheme	Marks
People will still have to travel by car, so the results won’t be very different	B2

Alternatives, assuming (incorrectly) users of P&R will report both methods or just public:

Scheme	Marks
Public transport increase or private decrease “Agree” may be implied. Ignore all else	B1 B0
P&R will result in more people using private transport, so this will show an increase Not just “Increase in private” without justification	B1 B0
Users of P&R will use both public and private, so not clear	B1 B0
No, because other changes might have been made that affect the proportions.	B2
If P&R users report both, or just public, then yes, public will show increase	B2
Recognition of issue as to whether P&R users should report private or public Hence unclear whether change will show	B1 B1

Other sensible answers may be seen not covered in this MS