Measurements of environmental quantities, Surveys, Output from previous systems, Transactions and Experimental results
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What's the difference between direct data and indirect data
Direct Data: Collected for a specific purpose. Indirect Data: Derived from data originally collected for an entirely different purpose (from a previous system).
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What is information?
Data that's been processed and has useful meaning
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How does data become information
It's processed, Converted to give meaning, Organised in some way
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What is processing?
The act of arranging data into a meaningful order
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Encoding?
Putting data/information in a specialised format, so it can be sent across a network or stored by an ICT effectively
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Example of encoding? (pictures)
Vector, Bitmap, TIFF, JPEG, GIF
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Example of encoding? (Sound)
WAV, MIDI, SHOCKWAVE AUDIO, MP3
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Example of encoding? (Text)
Docs, PDF
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Example of encoding? (Movies)
Mpeg
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How are numbers and words encoded?
With the use of Binary code
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Coding?
Producing a shorter version of data, to aid typing and validation of data e.g. M=male
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ASCII (American Standard Code for Information Interchange)
Code for representing characters in Binary
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Factors Affecting the Quality of Information (1):
1. Accuracy of Information e.g. incorrect bank statements due to wrong interests rates.
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Factors Affecting the Quality of Information (2):
2. How easily info. can be understood (clear)- If can't be understood time will be wasted
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Factors Affecting the Quality of Information (3):
3. Relevance - If info. is not relevant then it's just a waste of storage
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Factors Affecting the Quality of Information (4):
4. How current is the info. e.g. If a person moves to a new address with notifying then bills will be sent to the wrong person.
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Factors Affecting the Quality of Information (5) Timeliness of information:
5. Businesses may be at a high advantage if they can approach customers who are likely to change something. Using such information, the companies are then able to send promotional information to customers which would be beneficial to both parties
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Other cards in this set
Card 2
Front
What is Data?
Back
Raw facts and figures with no meaning
Card 3
Front
Forms that data can take?
Back
Card 4
Front
How can data arise?
Back
Card 5
Front
What's the difference between direct data and indirect data
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