1.1 - Data and Information (WJEC)

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  • Created by: daynayume
  • Created on: 17-05-16 16:28
What is Data?
Raw facts or figures.
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What is Information?
Data that has been processed to give it meaning.
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What is Knowledge?
Information when a set of rules has been applied to it.
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What is meant by GIGO?
Garbage In, Garbage Out. If something wrong is input into a c computer, then something wrong will be output.
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What are Validation checks used for?
To ensure that only sensible data is entered into a computer.
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What does Range Check do?
Checks that numbers are between a certain range.
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What does Format Check do?
Makes sure that the correct mix of letters and numbers is entered.
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What does Presence Check do?
Checks that a field is not empty.
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What does Check Digit do?
An extra number is added to the end of a longer set of numbers.
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When do Transcription errors occur?
When copying data to a computer.
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When do Transposition errors occur?
When characters are accidentally swapped around (Pressing Q instead of W)
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How can we minimise Transcription/Transposition errors?
Visually Checking (Proofreading) or Double-Keying (Entering data twice and checking that they are the same)
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What makes good quality data?
The accuracy of the data, it must be fit for purpose and it should not be biased.
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Other cards in this set

Card 2

Front

What is Information?

Back

Data that has been processed to give it meaning.

Card 3

Front

What is Knowledge?

Back

Preview of the front of card 3

Card 4

Front

What is meant by GIGO?

Back

Preview of the front of card 4

Card 5

Front

What are Validation checks used for?

Back

Preview of the front of card 5
View more cards

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