Flashcards in Encoding data Deck (11):
What is encoding data?
Encoded data is data replaced with short codes.
Example: Male/Female as M/F
Red/Green/Blue as R/G/F
What do we call a way of encoding an opinion?
A value judgement.
What are the different data types?
Definition and example of - BOOLEAN (data type)
It can hold one of two values.
Example: Yes/No, True/False, Male/Female, 1/0
Definition and example of - INTEGER (data type)
Holds whole numbers.
Example: 1, 2, 3, 4, 5.
Definition and example of - REAL (data type)
Holds decimal numbers.
Example: currency, 1.25
Definition and example of - TEXT/STRING (data type)
Holds any alphanumeric character, including letters, numbers and symbols.
What is a value judgement?
When there is no absolute agreement on the value of a data item. When this happens a value judgement is coded for computer input.
- A value judgement is a matter of opinion rather than fact
State an example of a value judgement.
Example: the following data may be collected on a dating agency form - I am: handsome /good looking / average / ugly
With value judgements there may be no single correct value, the value depends on someone's opinion.
Advantages of encoding data.
- Takes up less storage space in computers memory, m is one character male is 4 characters
- Less chance of transcription errors because the user is tying fewer characters
- Takes less time to type and is therefore faster to enter data
- Greater consistency of data the user is using a restricted set of values
- Processing is faster because less RAM is required