1. Stem & Leaf, Cumulative Frequency, and box plots
Mathsercise-C
Ready?
Stem & Leaf,
Cumulative Frequency,
and box plots
Here we go!

2. Complete this stem and leaf diagram for the weights of 10 newly born boys (in kg)
4.1 1
3.6 6
4.5 5
2.9 9
3.8 8
3.2 2
3.6 6
2.8 8
3.7 7
2.5 5
Question 2 2 4 3
Key: 4|1 = 4.1kg 1
Stem & Leaf
Answer

3. The stem and leaf table shows the number of students late each day to school last month
The median is the middle value!
Question 3
Key: 3|0 = 30 Students 1 12 2 3 3 6 6 8 9
The range is the highest value subtract lowest value 2 1 1 5 6 9 3 2 2 2 4 6 37 7
Answer
a) Find the median
b) Work out the range 2
Cumulative
Frequency -
= 25

4. 60 students took a test. The graph shows information about their marks
Question 4 60 6 10 14 18 25 30 35 15 20 50 45 40 55 2 4 8 12 5 16
a) What was the median mark?
b) What was the lowest mark?
Cumulative
Frequency
c) Estimate how many students scored 12 or less marks 20
d) Estimate the interquartile range
= 4.5 5 11
15.5 - 14 20 3
Cumulative
Frequency
Marks
Answer

5. 4 This box plot shows information about 40 students’ test marks24 22 28 26 32 30 36 34 38 46 44 42 40 52 50 48 54
Start
Which of these statements are true?
a) The top mark was 54
False - 53
b) The range was 35
False - 30
c) The median was 42
False - 38
True
d) The interquartile range was 12 5
e) ½ the students scored less than 38
True 4
Cumulative
Frequency
Answer