Page 71 - MAT KS3 Y8 Cambridge CheckPoint

End-of-unit review

End-of-unit review

1 Which of the three methods of collection would you use to collect this data?

Experiment Observation Survey

a the number of times a coin lands ‘face down’ when it is dropped 150 times
b the number of people that go into your local hospital each hour
c the number of pairs of shoes owned by students in your class

2 Ros runs a dance class. She wants to ask her students if they would prefer to start the
class at 7 pm or 8 pm. There are 46 students in the class.
Should Ros ask all the students in the class, or should she ask a sample of the students?
Explain your answer.

3 The population of a village is 986. Mason wants to know how often the people in the village use
the village hall. He decides to ask a sample of the population. How many people should be in his
sample?

4 Which of the following, A, B or C would be the most suitable degree of accuracy for measuring:
a the lengths of the longest rivers in the world
A nearest centimetre B nearest metre C nearest kilometre
b the time it takes students to run 10 km
A nearest hour B nearest minute C nearest second

5 Write down whether the following data is discrete or continuous.
a the number of eggs in a basket b the time it takes to prepare a meal
6 Here are the weights of some kittens, measured to the nearest gram.

155 171 200 195 230 205 208 180
185 198 212 190 205 175 210 224

a Copy and complete the grouped frequency table. Weight, w (g) Tally Frequency
b How many of the kittens weigh more than 170 g but 150 < w 170
less than or equal to 190 g?
c How many of the kittens weigh more than 190 g? 170 < w 190
d How many of the kittens weigh less than or equal 190 < w 210
to 210 g? 210 < w 230
e Altogether, how many kittens were weighed? Total

7 All the students in Mr Flynn’s class took a maths or a science exam. They all scored grade A, B or C.
There are 28 students in the class. 10 of the students took the science exam.
Four of the students scored a grade A for maths, five scored a grade A for science.
Eight students scored a grade C, three of these were in science.

Copy and complete the two-way table to show the A B C Total
numbers of grades A, B and C that were given for maths
Maths
and science.
Science
Total

6 Planning and collecting data 69