1. Histograms
Sunday, 07 April 2019

2. The heights of 20 students have been recorded in cm as shown
Example
The heights of 20 students have been recorded in cm as shown
Use the tally chart below to construct a frequency table
Represent this data on a histogram
154,
171,
156,
174,
168,
153,
166,
172,
159,
163,
161,
162,
160,
151
Height (cm)
Tally
Frequency
150 – 155
155 – 160
160 – 165
165 – 170
170 – 175

3. The histogram below shows the masses of a number of boys.
Example
The histogram below shows the masses of a number of boys.
frequency 2 4 6 8 10 12 30 35 40 45 50 55
How many boys weighed between 35 and 40 kg?
Which group had the largest distribution?
How many boys took part in this example?
A boy is selected at random, what is the probability that his mass is over 45kg?
Mass (kg)

4. Represent this data on a histogram
Example
The table below shows the distribution of marks obtained in a recent maths test.
Represent this data on a histogram
Mark
0 – 10
10 – 20
20 – 30
30 – 40
40 – 50
50 – 60
60 – 70
70 – 80
80 – 90
Frequency 1 6 14 12 15 7 5 3 2