Revision Of Averages
12 2 3 5 7 15
Find the mean, median, mode and range of these numbers:
Write down 4 numbers with
1) a mean of 10
2) and a median of 9
3) and a mode of 8
8, 8, 10, 14
1
2
3
For 10M7 find the • range in foot size
• modal eye colour
• median no of TVs in your house
4
These four numbers have a mode of 5.
Find the missing number.
2, 5, 3, --These five numbers have
a median of 5.
Find the missing number.
2, 5, 1, 10, ...
These five numbers have a range of 8.
Find the missing number.
8, 12, 7, 10, --
5
The mean
Find the mean number of dogs owned by 10m7
Find the mean number of cats owned by 10m7
Mean = total number of people in survey
Page 124 B2 onwards
6
Averages
Mode means
Median means
Range means
7
10 students were asked how many of these activities they
did after school or at the weekend.
swimming
go to the gym
athletics
dance
football
horse
riding
cycling
tennis
These are the results:
0, 0, 0, 1, 1
2, 2, 2, 3, 5
Find the mean, median, mode and range for the activities.
10 more students were asked and now the results are
0, 0, 0, 0,0,
1, 1, 1, 1, 1,
2, 2, 2, 2, 2,
4, 4, 4, 5, 6
You could add all
these up, or you
could try and think
of a shortcut..
Find the mean, median, mode and range for this set of data.
8
20 children were asked what they thought of PE.
They had to give it a mark out of 5 (5/5 being brilliant).
These were the responses:
5 marks
4 marks
3 marks
2 marks
1 mark
7 children
5 children
4 children
2 children
2 children
Find the mean score.
Fill in the table:
Marks
frequency
1
2
3
4
5
9
On average, how many portions of fruit and veg do we eat each day?
Mean Of Data
number
0
1
2
3
4
5
6
tally
total
11
111
1111
11
111
11
1
10
Pie Charts
Draw pie charts for the following data:
100 football
100 netball
100 tennis
60 swimming
100 pop
50 R&B
30 rock
20 walk
20 bike
30 bus
10 train
10 other
10 TV
16 computer games
8 read a book
12 listen to music
14 watch a DVD
11
Attachments
dirtydata­1.doc
8734602­StBedesInter­ChurchSchool­Phase6Secondary.xls