year 8 maths

Chapter review
591
10 120 people were asked to nominate their favourite takeaway food from the list: chicken, pizza,
hamburgers, Chinese. The results are given in the table.
Food
Frequency
chicken 15
pizza 40
hamburgers 30
Chinese 35
a If you want to show the data in a sector graph,
state the angle needed to represent Chinese food.
b What percentage of people prefer hamburgers?
c Represent the results in a sector graph.
11 Consider the data 1, 4, 2, 7, 3, 2, 9, 12 . State the:
a range b mean c median d mode
12 Consider the data 0, 4, 2, 9, 3, 7, 3, 12 . State the:
a range b mean c median d mode
Extended-response questions
1 The number of rainy days experienced throughout a year in a certain town is displayed below.
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
No. of rainy days 10 11 3 7 2 0 1 5 6 9 7 5
a Show this information in a line graph.
b For how many days of the year did it rain in this town?
2 At a school camp, a survey was conducted to establish each student’s favourite dessert.
Ice-cream Yoghurt Danish pastry Jelly Pudding Cheesecake
10 5 2 7 4 12
a How many students participated in the survey?
b What is the most popular dessert selected?
c What is the probability that a randomly selected student chooses jelly as their favourite dessert?
d For each of the following methods listed below, state whether it would be a reasonable way of
presenting the survey’s results.
i column graph ii line graph
iii sector graph
iv divided bar graph
e If the campers attend a school with 800 students, how many students from the entire school would
you expect to choose pudding as their preferred dessert?
Cambridge Maths NSW
Stage 4 Year 8 Second edition
ISBN 978-1-108-46627-1 © Palmer et al. 2018
Cambridge University Press
Photocopying is restricted under law and this material must not be transferred to another party.