Higher June 2017 Paper 4 Q12

OCRHigherCurrent spec4 marksCumulative Frequency

12 The cumulative frequency graph shows the speeds, in miles per hour (mph), of vehicles passing a 40 mph speed limit sign on a road.

A speed camera will be installed if more than 30% of vehicles go over the speed limit of 40 mph.

Use information from the graph to decide if a speed camera should be installed. [4]

Mark scheme

Answer	Marks	Part marks and guidance
55 soi by 25	B1	condone if written on graph	accept any correct method e.g B1 for 55 M2 for [0].7 × 80 soi 56 or M1 for [0].3 × 80 soi 24 A1 for 55 and 56 so yes
80 – their55 soi 25	M1
[0].3[0] × 80 soi 24	M1	or their 25 ÷ 80 or 31[%] or 31.2 to 31.3[%]
25 and 24 so yes oe	A1	31[%] or 31.2 to 31.3[%][and 30] so yes A1dep on both M1s and A1FT follow through from their 55