Science test results
This task is about completing a stemandleaf graph.
The scores of 28 students in a science test were:
2, 3, 6, 7, 8, 9, 10, 10, 11, 11, 12, 12, 13, 13, 13, 14, 16, 17, 19, 21, 22, 22, 24, 25, 26, 27, 27, 28
a) 
In the box below, draw a stem and leaf graph to show these results.


b) 
What is the most common score? __________ 

c) 
How many children scored from 10 to 19? __________ 

d) 
Subtract the lowest score from the highest score. The answer is __________ 

e)  The spread of scores from the highest to lowest is called the __________ 