Statistics
presentations of Data
Twitter: @Owen134866
www.mathsfreeresourcelibrary.com
, Prior Knowledge Check
1) The table shows the number 2) Work out the interquartile
of siblings for 50 Year 12 range for this set of data:
students
3 5 8 9
Number of
siblings
Frequency 9 11 14 15 11
0 5 18 20 21 24
1 8
2 24 3) Work out the mean and
3 10 standard deviation for this set of
data: 17 19 20 25
4 3
Draw a bar chart and a pie chart 28 31 32 32
to show the data:
35 37 38
28.5, 7.02
,Teachings for
Exercise 3A
, Representations of Data
An outlier is an extreme value
which lies outside the overall
pattern of data The interquartile
Upper range, multiplied
quartile by a constant
There are different ways to calculate
outliers, but a common definition of
an outlier is:
Greater than 𝑄3 + 𝑘( 𝑄3 −𝑄 1)
In the exam, you will
be told what value of
OR
to use
Less than 𝑄1 −𝑘(𝑄 3 − 𝑄1)
Lower
The interquartile range,
quartile
multiplied by a constant
3A
presentations of Data
Twitter: @Owen134866
www.mathsfreeresourcelibrary.com
, Prior Knowledge Check
1) The table shows the number 2) Work out the interquartile
of siblings for 50 Year 12 range for this set of data:
students
3 5 8 9
Number of
siblings
Frequency 9 11 14 15 11
0 5 18 20 21 24
1 8
2 24 3) Work out the mean and
3 10 standard deviation for this set of
data: 17 19 20 25
4 3
Draw a bar chart and a pie chart 28 31 32 32
to show the data:
35 37 38
28.5, 7.02
,Teachings for
Exercise 3A
, Representations of Data
An outlier is an extreme value
which lies outside the overall
pattern of data The interquartile
Upper range, multiplied
quartile by a constant
There are different ways to calculate
outliers, but a common definition of
an outlier is:
Greater than 𝑄3 + 𝑘( 𝑄3 −𝑄 1)
In the exam, you will
be told what value of
OR
to use
Less than 𝑄1 −𝑘(𝑄 3 − 𝑄1)
Lower
The interquartile range,
quartile
multiplied by a constant
3A
