Unit 2 - Section 10 - Data and Information
- Created by: annalee1234
- Created on: 07-03-17 13:45
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- Data and information
- What is data?
- Data represents raw fact and figures or a set of values.
- Types of data
- Data can take the form of numbers, text, still or moving images and sound.
- Bits and bytes
- Computers store and process data using binary numbers
- A single unit in binary is a 'bit'. Computer memory is measured in 'bytes' and one 'byte' is made up of eight bits.
- Computers store and process data using binary numbers
- Coding and encoding
- Encoding: used by computers to convert data into machine readable form.
- Coding: some data is coded on collection before being entered and this changes the original data into a shortened version by assigning a code
- Processing data
- Processing is the work the computer does on the data to convert it into information
- Information is data that has been processed into something that is meaningful
- Quality of information
- What makes information valuable?
- Accuracy
- Information needs to be accurate within businesses as it can often be used to help businesses to make important decisions.
- Thorough error checking must take place and regular updates must be applied if the information is to remain accurate.
- Information needs to be accurate within businesses as it can often be used to help businesses to make important decisions.
- Up to date
- Some information only has value within a specific timescale.
- Complete
- If the information produced is not fully complete then it loses its value
- From a reliable source
- There is a lack of control on the content included on Internet websites which can often reduce the value of the information obtained
- Users are encouraged to find their information from trusted sources
- There is a lack of control on the content included on Internet websites which can often reduce the value of the information obtained
- Relevant
- Information is only valuable to someone who has a use for it
- Accuracy
- What makes information valuable?
- What is data?
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