Ks3 Mathematics 10-4-10 Level 5 Answer Booklet Page 22
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31DAY 7
(b)
Lisa says:
“We can go into town on Saturday morning.
We can stand outside a shop and record how many people walk past and how many
of those drop litter.”
Give two different reasons why Lisa’s method might not give very good data.
First reason: Could be
Would
the
1. The sample is not representative because only certain
day
people shop on a Saturday morning.
and
OR
time of the
1 mark
2. The type of shop might determine how much litter is
survey make
dropped. Eg More litter outside Burger King where
a
people want to get rid of packaging. Less litter outside
difference?
JJB Sports
Would you drop
litter if someone
was watching you?
Second reason: Could be
1. She might count someone twice if they walk past the
Would the
shop more than once.
type of shop
OR
she stood
2. People might not act like they usually would if someone
1 mark
outside
is watching them. E.g. They may put litter in their
a
make
pocket when they would usually drop it.
e?
differenc
How will she know
who she has
counted?
Cubes
This shape is made from four cubes joined together.
The table shows information about the shape.
3
Volume
4 cm
2
Surface Area
18 cm
The same four cubes are then used to make this new
shape.
How many square faces
Complete the table for the new shape.
could you see on all
sides?
Front 4
3
How many
Volume
4 cm
Back 4
cubes?
8 around the edges
2
16
4 + 4 + 8 = 16
Surface Area
18 cm
22
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