Speed camera

Speed camera

Pencil and paper
Overview
Using this Resource
Connecting to the Curriculum
Marking Student Responses
Further Resources

Type of vehicle Number
Passing Speed
Camera		 Number
Caught by Speed
Camera
Private Car
Van
Taxi
Bus
Truck

1600
  250
    20
    30
  100

20
15
  5
  0
10
TOTAL

2000

50

 

The table shows the number of vehicles passing a speed camera, and the number caught by the camera.

 


a)
What percentage of taxis were caught speeding? __________ %
 
b)
What percentage of all vehicles were caught speeding? __________ %
 
c)
Make a statement which compares the percentage of trucks with the percentage of all vehicles that were caught speeding.
 
 
 
 
 
 
Task administration: 
This task is completed with pencil and paper only.
Levels:
4, 5
Curriculum info: 
Maths, Statistics, Probability
Keywords: 
frequency tables, table interpretation, percentages, probability
Description of task: 
Students interpret data presented in a frequency table to calculate percentages and make comparisons.
Curriculum Links: 
This resource can be used to help to identify students' ability to compute and compare probabilities expressed as percentages.
Learning Progression Frameworks
This resource can provide evidence of learning associated with
Interpreting statistical and chance situations, sets 4-5
Interpreting statistical and chance situations, set 5
within the Mathematics Learning Progressions Frameworks.
Read more about the Learning Progressions Frameworks.
Answers/responses: 
 

Y10 (07/1998)
a) 25% easy
b) 2.5% moderate
c) A higher percentage of trucks were caught speeding (10%) than the percentage for all vehicles (2.5%).
NOTE: Accept if a comparison is made between the percentage of trucks speeding (10%) and their answer in b).		 difficult