data sources

• Primary data– Data that you have collected yourself, or someone has collected on your behalf.
• Secondary data – Data that has already been collected
• primary data -advantages: accurate,collection method known,can find answers to specific questions
• primary data -disadvantages: time consuming, expensive
• secondary data - advantages : cheap,easy,quick,data from some organisations can be more reliable than data collected yourself
• secondary data -disadvantages:method of collection unknown,data may be out of date,may contain mistakes,may come from unreliable source,may be difficult to find answers to specific question