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The contents of seed packets are recorded to the nearest 10.
Level 5-6 Data Handling - Quantitative Data
In KS3 Maths, dealing with data means encountering two main types - quantitative and qualitative. Qualitative data includes non-numerical things like colours, gender, or favourite films. On the other hand, quantitative data involves numbers, like the count of people with red hair, the number of males or females in a school, or how many liked the latest Star Wars film.
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1 .
If data can only take certain numerical values it is called discrete. Which of these types of data is discrete?
The colour of an apple
The number of pips in an apple
The volume (in cm3) of an apple
The weight (in g) of an apple
An apple only has half a pip if it's been cut in half
2 .
If data can be measured against a scale it is called continuous. Which of these types of data is continuous?
The beds in wards of a town's hospital
The heights of buildings in a town
The names of roads in a town
The number of pupils in a town's schools
Height can be measured against a continuous scale
3 .
Adults responding to a survey are asked to choose their age group from these: 18-25, 25-40, 40-60, over 60. What is wrong with this choice?
No ages below 18
Age group intervals are all different
Intervals overlap
'Over 60' is too vague
Adults are 18 or over. Someone aged 25 or 40 wouldn't know which box to tick
4 .
Which of these can be read from a grouped frequency table of children's heights (h cm) recorded in 10cm intervals?
Heights of individual children
The height range
The median height
The modal height interval
As the heights are grouped into 10cm intervals we do not know any of the heights exactly and therefore can't find out the range, median or any individual hights
5 .
The frequency recorded in the interval 130 < h ≤ 140 is 5. This means that five children are .......
at least 130cm tall
less than 140cm tall
135cm tall
over 130cm and up to 140cm tall
< means that they are more than 130cm tall and ≤ means they are less than or equal to 140cm tall
6 .
Which of these intervals would include a height of 130cm?
125 ≤ h < 130
130 < h ≤ 140
120 < h ≤ 130
h >130
The sign ≤ means 'less than or equal to'
7 .
The contents of seed packets are recorded to the nearest 10. A pack with 43 seeds is recorded as having .......
30 seeds
35 seeds
40 seeds
45 seeds
This is simple rounding down
8 .
A packet of 50 seeds (to the nearest 10) will contain at least .......
44 seeds
45 seeds
54 seeds
55 seeds
45 is the lowest number that can be rounded up to 50
9 .
The contents of 20 packets of seeds (to the nearest 10) are: 5 x 30, 9 x 40, 5 x 50, 1 x 60. What is the best estimate for the total number of seeds in these packs?
630
750
820
940
(5 x 30) + (9 x 40) + (5 x 50) + (1 x 60)
10 .
The contents of 20 packets of seeds (to the nearest 10) are: 5 x 30, 9 x 40, 5 x 50, 1 x 60. What is the best estimate for the mean (average) contents of these seed packets?
41
42
43
44
820 / 20 = 41
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