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Level 5-6 Data Handling - Quantitative Data
The contents of seed packets are recorded to the nearest 10.

Level 5-6 Data Handling - Quantitative Data

When handling data in KS3 Maths you'll come across two distinct types - quantitative and qualitative. Qualitative data refers to things with no numerical value, such as colours, gender, favourite films etc. Quantitative data is data which can be represented by a number, such as the number of people with red hair, the number of males or females in a school or the number of people who liked the latest Star Wars film.

In addition, there are two types of quantitative data; countable (discrete) and measurable (continuous). Discrete data will always give you a whole number (how many children like apples, for example. You'll never get half a person!). Measurable data may very well give you fractions (how tall is that building? 11.37 metres). Do you see the difference? You need to recognise and know how to deal with these different types of quantitative data.

Try the following quiz to acquaint yourself with discrete and continuous quantitative data. Good luck!

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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
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
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
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
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
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'
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
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
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?
(5 x 30) + (9 x 40) + (5 x 50) + (1 x 60)
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?
820 / 20 = 41
Author:  Frank Evans

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