Lecture 7 B Data and Info.
Transcript of Lecture 7 B Data and Info.
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DEFINITION
Data are raw facts and figures relating to people,
places, things and events.
CHARACTERISTICS Unprocessed,unorganized and discrete (in
separate, unrelated chunks).
Qualitative (opinion-based, subjective).
Quantitative (measurement-based, objective). Detailed.
Sampled.
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DEFINITION
Information is data that have been converted into ameaningful and useful context for use by specificusers.
CHARACTERISTICS Information can be classified according to its content.
For example, one can distinguish between factualinformation, simply describing a single idea which is
(perceived to be) true; or analytical, usually based onan analysis of a number of facts.
An alternative distinction is between subjectiveinformation (i.e. based on an individual's opinion), orobjective (i.e. rooted in fact).
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CHARACTERISTICS
Another important aspect of information is
timeliness. Information which is true (andrelevant) at one point in time, might lose its
truth or relevance at another point in time. Forexample, population statistics that were
accurate in 2007 are no longer accurate in 2010.
However, perhaps the most important
characteristic of information is reliability. Noteverything that is presented as information is
true and/or believable. It is important that you
become aware that not everything you read is
true.
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CHARACTERISTICS
It is also important that you become aware of
information as a commodity. Information can besold and bought. Moreover, information is often
owned by some individual or organization. Also,this brings out a number of issues to do with
ethical and legal implications of the use of
information technology. For example, issues to
do with confidentiality and security areimportant considerations in this context.
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CHARACTERISTICS Inconsistency. Is the final form similar to or means the
same as its original form? Is it complete? e.g. omittedfacts, distortion.
Incomprehensibility. Is it clear? Is it easy to
understand? Subject to interpretation. Is the source/target
objective or subjective? Do you understand it or knowwhat it means?
Value. Is it important and useful? Is it truthful?
Relevance. Is it significant? Is it applicable? Is it
current? Confidentiality. Is it classified? Is it private or public?
e.g. personal health, a countrys state of affairs.
Timeliness. Is it immediate? Is it current? Is itapplicable? Can it be accessed quickly?