This document explains how to represent math test score data for 30 students using a stem and leaf diagram. [1] The test scores ranged from 40 to 81 and are grouped into the 40s, 50s, 60s, 70s, and 80s. [2] The stem represents the tens place value and the leaves are the units that follow each ten. [3] The modal score is in the 60-69 group and the median score is 63.

1. October 4, 2012
Grouping Data
1. Stem and leaf diagrams.
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2. Explanation October 4, 2012
These are the maths test 69 58 68 80 81 70 49 53 68 47
63 59 65 61 57 54 57 40 75 63
results for 30 students. 81 65 44 76 61 70 52 64 59 74
You can show this data is in a stem and leaf diagram.
The results are either in
4 4 9 0 7 the 40s, the 50s, the
60s, the 70s or the 80s
5 8 9 74 7 2 3 9
Write these ‘tens’
6 9 3 5 851 14 8 3 figures on the stem.
7 6 0 054 The leaves are made up
from the units that follow
8 1 0 1 each ’10’ number.
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3. Explanation October 4, 2012
These are the maths test 69 58 68 80 81 70 49 53 68 47
63 59 65 61 57 54 57 40 75 63
results for 30 students. 81 65 44 76 61 70 52 64 59 74
You cana kind this data is inchart. and leaf diagram.
This is show of frequency a stem
It enables you to find useful information.
4 4 9 0 7 The modalneed tois thein
You results are either
The now group write
60-69 group. 50s, the in
out the units numbers
the 40s, the
ascending order 80s
60s, the 70s or the
5 8 9 74 7 2 3 9 As there are 30 results,
the medianleaf diagrams
Stem and result is mid
Write these ‘tens’
6 9 3 5 851 14 8 3 way between the 15this.
are written the stem. and
figures on out like
th
16th.
7 6 0 054 Starting at 40, the 15th up
The leaves are made
result is 63, as is the 16th,
from the units that follow
8 1 0 1 so the ’10’ number.
each median is 63.
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