Difference between revisions of "Página de pruebas 3"
Adelo Vieira (talk | contribs) |
Adelo Vieira (talk | contribs) |
||
Line 5: | Line 5: | ||
! rowspan="2" | | ! rowspan="2" | | ||
! rowspan="2" | | ! rowspan="2" | | ||
− | ! rowspan="2" style="width:80px;" |Values have any meaningful order | + | ! rowspan="2" style="width:80px; background-color:#F2D7D5" |Values have any meaningful order |
! rowspan="2" style="width:80px;" |Distance between values is defined | ! rowspan="2" style="width:80px;" |Distance between values is defined | ||
! colspan="3" style="width:80px;" |'''Mathematical operations make sense''' | ! colspan="3" style="width:80px;" |'''Mathematical operations make sense''' | ||
Line 12: | Line 12: | ||
! colspan="5" style="width:80px;" |Values can be used to perform statistical computations | ! colspan="5" style="width:80px;" |Values can be used to perform statistical computations | ||
! rowspan="2" |Example | ! rowspan="2" |Example | ||
− | |- | + | |- |
! style="width:80px;" | '''Comparison operators''' | ! style="width:80px;" | '''Comparison operators''' | ||
! style="width:80px;" | Addition and subtrac tion | ! style="width:80px;" | Addition and subtrac tion |
Revision as of 21:51, 24 November 2020
Values have any meaningful order | Distance between values is defined | Mathematical operations make sense
(Values can be used to perform mathematical operations) |
There is a meaning ful zero-point | Values can be used to perform statistical computations | Example | ||||||||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Comparison operators | Addition and subtrac tion | Multiplica tion and division | "Counts", aka, "Fre quency of Distribu tion" | Mode | Median | Mean | Stn | ||||||||||||||||||||||||||||
Nominal | Values serve only as labels |
|
For an attribute "outlook" from weather data, potential values could be "sunny", "overcast", and "rainy". | ||||||||||||||||||||||||||||||||
Ordinal | Distinction between nominal and ordinal not always clear (e.g., attribute "outlook") |
|
An attribute "temperature" in weather data with potential values fo: "hot" > "warm" > "cool" | ||||||||||||||||||||||||||||||||
Interval |
|
An example of an interval variable would be temperature. We can correctly assume that the difference between 70 and 80 degrees is the same as the difference between 80 and 90 degrees. However, the mathematical operations of multiplication and division do not apply to interval variables. For instance, we cannot accurately say that 100 degrees is twice as hot as 50 degrees. Additionally, interval variables often do not have a meaningful zero-point. For example, a temperature of zero degrees (on Celsius and Fahrenheit scales) does not mean a complete absence of heat. | |||||||||||||||||||||||||||||||||
Ratio |
|