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9 Cards in this Set
- Front
- Back
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Define data |
Data consists of raw facts and figures and / or records of transactions |
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Define information |
Data that has been processed by the computer or given a context |
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Define knowledge |
Knowledge is derived from information by applying rules to it |
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What is the example for knowledge, information and data? |
- 10, 20, 15 and 30 is data - Context is that these are times in seconds for a 100m race, making them information - The rule applied is that the lowest number is the winner of the race, therefore making it knowledge |
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Give the advantages of encoding data before entering it into a system |
- Saves time typing in the data - Reduces the amount of hard disk space used - Lessens the chance of entry errors - Faster to search |
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Why does encoding data lessen the chance of data entry errors? |
- Data is easier to validate - Data is recorded with greater consistency |
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Encoding value judgements can lead to inaccurate results. Explain. |
- Encoding can coarsen data - Loss of precision must be weighed against advantages - Subjective judgements have to be made |
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Give the examples of encoding value judgements |
- In a hair colour survey, light brown, mousey and dark brown would all be classified as brown as all categories not present - One person's excellent meal may be poor for someone else |
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What is the difference between encoding and encryption? |
- Encoding is giving something a shortened code for data entry eg UK - Encryption is scrambling data so they can't be read eg credit card details |
