251556
Descrição
Mapa Mental por s.guyomard, atualizado more than 1 year ago
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Criado por s.guyomard
aproximadamente 11 anos atrás
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Topic one - Data and
quality of data
- Data
- Forms data can take
- Numbers
- Words
- Images
- Sounds
- Video
- Numbers
- Definition of Data
- Data consists of raw facts and figures (e.g
reading from sensor survey facts, etc
- These raw facts and figures are meaningless
because they lack relevance
- If you look at data, it is either no use to you or not in a
form you can't use
- Data consists of raw facts and figures (e.g
reading from sensor survey facts, etc
- Ways in which data can arise
- From the results of experiments
- From automatic measurements using
sensors (temperature, rainfall, pressure.)
- From a transaction (buying a
download on the internet)
- From a survey
- From the results of experiments
- Encoding data
- Data is often coded when it is collected
on input into an ICT. The reasons for this
are:
- Coded data is quicker to type in
- It takes up less storage space on a disk
- If is easier to do validation checks
- Faster to access data that is coded
- It is quicker to send data over
a network
- Coded data is quicker to type in
- Data is often coded when it is collected
on input into an ICT. The reasons for this
are:
- Forms data can take
- Information
- Data processed by the computer
- Having calculations performed on it
- Converted to give it meaning
- Organised in some ways (putting
it into numerical order.)
- Having calculations performed on it
- Data processed by the computer
- Knowledge
- Obtained from information by applying rules to it.
- Obtained from information by applying rules to it.
- GIGO (Garbage in, Garbage out)
- If you enter incorrect data into the computer then the
output from the computer will also be incorrect
- If you enter incorrect data into the computer then the
output from the computer will also be incorrect
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