Yr 8
Do Now
Learning Intention
Interpret dot plots and
stem-and-leaf plots
Lesson Outline
Success Criteria
1. Intro to dot plots
2. Class practice
3. Intro to stem-and-leaf
plots
4. Class practice
Draw and interpret dot
plots
Draw and interpret
stem-and-leaf plots
Dot plots have one axis and then dots are drawn
above them.
 The dots have to have the same height
STEP 1
Circle the lowest and highest score
STEP 2
Number the axis from lowest to
highest
* NOTE: You must also include any numbers that are
not in the data set
STEP 34
Place
each number. Cross
Checkdots
yourfor
work!
them off as you go.
Ms Jung’s Yr 9
It may
to visualise
it astoan
actual
Stem
andhelp
leaf diagrams
are used
group
and
organize data
makeleaf
it easier
read and use
stemtoand
of atoplant
Age of people visiting a
play park
2, 34, 46, 32,
25, 29, 32,
49, 8, 22, 39,
41, 2, 3, 27,
33, 43
Stem
Leaves
0
2 2 3 8
2
2 5 7 9
3
2 2 3 4 9
4
1 3 6 9
Key
2 7
= 27
Put these data sets into stem and
leaf diagrams:
Number of pizzas ordered in a restaurant each day
25, 5, 36, 17, 37, 25,
23, 22, 4, 16, 38, 11, 3
What if our data was in decimals?
0.4, 2.1, 1.3,
1.2, 0.7, 0.2,
0.3, 1.9, 2.3,
2.9, 0.7, 1.4
0
1
2
Key
0 7 = 0.7
Or hundreds?
134, 156, 137,
140, 139, 135,
142, 148, 133,
150, 142, 139,
13
14
15
Key
13 9 = 139