Collection of Data

 

The easiest way to collect data is by using charts or graphs as shown below

Bar chart showing the frequency of boys and girls against the number of pets owned

We can find the required data by looking at the above graph.

1) Question: How many pets were owned by the same number of boys and girls?

 Answer: 4 pets.

 You will note that the height of the bar is the same for both boys and girls for 4 pets.

2) Question: How many more girls than boys were part of the survey?

 Answer: 2 girls.  

 Therefore, in total, the number of girls versus boys = total for girls : 1 + 5 + 7 + 0 + 1 = 14

 total boys :  2 + 3 + 5 + 1 + 1 = 12