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Attributes are closely related to variables. A variable is a logical set of attributes. [1] Variables can "vary" – for example, be high or low. [1] How high, or how low, is determined by the value of the attribute (and in fact, an attribute could be just the word "low" or "high"). [1] (For example see: Binary option)
It is recommended to use absolute measurements, such as risk difference, alongside the relative measurements, when presenting the results of randomized controlled trials. [4]
A statistic (singular) or sample statistic is any quantity computed from values in a sample which is considered for a statistical purpose. Statistical purposes include estimating a population parameter, describing a sample, or evaluating a hypothesis. The average (or mean) of sample values is a statistic. The term statistic is used both for the ...
Two main statistical methods are used in data analysis: descriptive statistics, which summarize data from a sample using indexes such as the mean or standard deviation, and inferential statistics, which draw conclusions from data that are subject to random variation (e.g., observational errors, sampling variation). [4]
An attributive verb is a verb that modifies (expresses an attribute of) a noun in the manner of an attributive adjective, rather than express an independent idea as a predicate. In English (and in most European languages), verb forms that can be used attributively are typically non-finite forms — participles and infinitives — as well as ...
Given a set of specific cases, find attributes of those cases. What are the values of attributes {X, Y, Z, ...} in the data cases {A, B, C, ...}? - What is the mileage per gallon of the Ford Mondeo? - How long is the movie Gone with the Wind? 2 Filter: Given some concrete conditions on attribute values, find data cases satisfying those conditions.
Attribute may refer to: Attribute (philosophy), a characteristic of an object; Attribute (research), a quality of an object; Grammatical modifier, in natural languages; Attribute (computing), a specification that defines a property of an object, element, or file; Attribute (knowledge representation), a component of an ontology
The positive predictive value (PPV), or precision, is defined as = + = where a "true positive" is the event that the test makes a positive prediction, and the subject has a positive result under the gold standard, and a "false positive" is the event that the test makes a positive prediction, and the subject has a negative result under the gold standard.