Data collection

WEEK 9&10

Topic:  Data collection

A pictogram or pictograph represents the frequency of data as pictures or symbols. Each picture or symbol may represent one or more units of the data.

Example :

The following table shows the number of computers sold by a company for the months of January to March. Construct a pictograph for the table.

A) How many students go to school by car?

b) If the total number of students involved in the survey is 56 how many symbols must be drawn for the students walking to school?

c) What is the percentage of students who cycle to school?

.

Solution:

a) 20 students

b) 56 students should be represented by 56 ÷ 4 = 14…