Histograms Sunday, 07 April 2019

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

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)

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