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WJEC ICT - UNIT 1 - Data, Information and Knowledge (Topic 1)

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Mark Ormesher

on 7 April 2011

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Transcript of WJEC ICT - UNIT 1 - Data, Information and Knowledge (Topic 1)

Data, Information
and Knowledge What are they? Data Raw facts and figures, a group of values, measures or records of transations

Eg. 157, 158, 162, 164 Information Once data is explained and given a meaning, it becomes information

Eg. These are a list of peoples' heights: 157, 158, 162, 164 Applying rules to information allows us to create knowledge by forming judgements or making decisions

Eg. These are a list of peoples' heights: 157, 158, 162, 164
The last person is tallest Knowledge Where does data come from? Encoding data Automatic recordings from the environment

Eg. Temperature, sunlight Results of a survey

Eg. What is your favourite position? Output from another piece of computer software

Eg. 0111001010110100011
11010111010100010111101 Records of business trasactions

Eg. Beep... Beep... Beep... Do you have a Nectar card? Results of an experiment

Eg. Study on how many jelly babies a field mouse can eat before it explodes Assign a code for each possible value or range of values.

Eg. Eye colours:
BL = Blue
BLK = Black
BR = Brown
GR = Green
OT = Other How? Why? Less space required Faster to input coded data Less to type means lower odds of error Why not? Coarsens data May involve a value judgement
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