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| Practise mental
division of 2-digit numbers by 1-digit numbers, |
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- Calculate statistics
for small sets of discrete data
- Find mode, median & range; and modal class
for grouped data
- Calculate mean, including from a simple frequency
table, using a calculator for a larger number of
items |
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average
mode
modal class
modal group
median
mean
range
discrete data
grouped data
(frequency) table
tally
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Use an introductory
Q such as: 'What's the average height in this room?'
to allow a discussion that includes the 3 types
of average & range.
Define 3 averages & mean. |
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Activity
Suggestions:
1) Complete 'average height' activity & compare
3 averages; (discuss which average is most &
least representative & why); range |
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| A5 plenary cards
with mean, mode, median & range values for some
hidden number lists. Whole class participation to
work out the hidden number lists |
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Pp 256 - 260
16 x A5 plenary cards |
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'Show
Me' Cards or number fans to find the mean
of 3 or 4 lists of numbers;
OR
Sparks
23:Averages |
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Recap mean in context
for longer list of numbers, & use to highlight
need for a table.
Eg: 'how many brothers?' for 30 pupils. |
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1) Collect data
from class on a variety of issues, (eg: how many
coins does each pupil have?) Use to produce frequency
table & calculate mean (& range).
2) Extension:: grouped data
OR
3) 'Your
Nation' geographical data (wide range of statistics
on over 100 countries)
OR
4) Data
Handling Games |
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Recap method of
calculating mean; compare mean result in 1 of the
activities with mode & median.
Discuss usefulness of 3 different means |
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| Show a bar chart
/ bar-line graph on OHP / board & ask for useful
sentences about them. |
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| - Interpret diagrams
& graphs (including pie charts), and draw conclusions
based on the shapes of graphs & simple statistics
for a single distribution |
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frequency diagram
bar chart
bar-line graph
compound bar chart
pie charts |
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Show same bar chart
/ bar-line graph, but with different scales for
discussion.
Link to previous work on frequency tables. |
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1) In
pairs / groups: discuss & interpret a
number of diagrams, to include:bar charts, compound
bar charts, bar-line graphs
OR
2) 'Your
Nation' geographical data (wide range of statistics
on over 100 countries) |
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Allocate to each
of 4 pupils
1) long list of nos,
2) related frequency table,
3) bar chart &
4) bar-line graph; rest of class to ask Qs such
as 'most popular number?'; discuss which of 4 pupils
found it easiest to answer & why. |
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Pp 268 - 270
Range of graphs & charts |
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