What is data collection?
Data collection involves deciding what data to collect, locating it and collecting it. Data comes from either primary or secondary source. There are different types of data collecting methods including census’, random sample, stratified sample, systematic sample, etc. The videos below will help you not only identify the type of sample that would be beneficial to this data space, how to solve questions revolving around data collection in Prelim Standard Math and further how to collect data yourself for different investigations.
Why do we need to collect data?
The video below explains the reasons why we need to collect data and who can benefit from using this kind of data.
What is the difference between primary and secondary sources?
The following video explains the key difference between primary and secondary sources.
Which approach to sample spaces should I take?
The videos below will explain the difference between different types of sample spaces and which method is better in different situations.