people do surveys to see how to better or improve a business or to see who prefers one thing to another...
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A sample survey is asked of a limited group of people, while a census is conducted in an attempted to get an answer from all people in a geographical area.
Asking about the shopping behaviour to people in a mall.
A survey is used more often than a census because a census requires everybody to respond, while a survey only needs a few people. This means a survey is advantageous for many reasons:It doesn't matter if not everyone responds, you can just survey more people.It is much cheaper to survey than hold a census.It is less effort to hold a survey than hold a census.It takes less time to hold a survey than hold a census.
The population is a group of interest, such as the people who filled out a recent survey about their age. The parameter is the descriptive measure of that population. So in this example, a parameter could be the average age of the people who filled out the survey.
stratified random sampling