ICT Unit 1 Chapter 1 Keywords

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Data
Raw, unprocessed facts and figures with no meaning or context. Often from sensor readings, surveys, data entry form.
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Information
Data once it has been processed (by a computer). Has some context. eg. 42 hats rather than 42.
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Knowledge
Information once rules have been applied so it can be more useful and conclusions can be drawn.
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GIGO
Garbage In Garbage Out - The theory that quality of data output is only as good as computer input as a computer can only process by the rules given and can't think.
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Data storage
The storing of data after data entry, memory in a computer often in RAM form.
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Range check
Checks that values given are within a given range, checks it is a reasonable value.
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Format check
Checks that data is in the correct format such as by an input mask e.g. postcode is ZZ0 0ZZ
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Presence check
Used for required fields in online data entry form to check that there is data inputted.
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Check digits
A type of validation technique in computer communication using a number added to a data packet or a calculation done based on the data to check it's accuracy.
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Verification
Types of checks done on data to check the accuracy of data inputted.
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Validation
Checks to see if data inputted is reasonable and sensible but doesn't check it's accuracy.
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Transcription error
Random errors which occur when data is entered into a system where the digits completely change.
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Transposition error
Where the order of letters entered into a sytem are changed.
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Sampling error
Errors due to the sample size and the difference between the values of the sample and the total population.
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Typographical error
An error made in the typing process such as a transposition or transcription error.
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Other cards in this set

Card 2

Front

Data once it has been processed (by a computer). Has some context. eg. 42 hats rather than 42.

Back

Information

Card 3

Front

Information once rules have been applied so it can be more useful and conclusions can be drawn.

Back

Preview of the back of card 3

Card 4

Front

Garbage In Garbage Out - The theory that quality of data output is only as good as computer input as a computer can only process by the rules given and can't think.

Back

Preview of the back of card 4

Card 5

Front

The storing of data after data entry, memory in a computer often in RAM form.

Back

Preview of the back of card 5
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