Collection of Data — Economics STD 11 Commerce — Question

Example 1: A study was conducted to know the average income of people in a village. The total number of person was 750. Out of these, 70 villagers selected and their average income was recorded. So, in this example:

• Population is the number of total villagers which is equal to 750.
• Sample is the 70 villagers whose average income was recorded.
• Variable under study is the income of the villagers.

Example 2: In order to study the to record the level of sugar in the blood, blood sample of 1000 people was taken from 10,000 people. So, in this example

• Population is the total number of people i.e., 10,000.
• Sample is the 1000 people.
• Variable is the sugar level.