Continuous vs Binary Variables Quiz
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Questions and Answers

In the context of the text, what type of attributes are most often used in transaction data?

  • Continuous
  • Binary (correct)
  • Categorical
  • Discrete
  • How can a data object in a collection of data with the same fixed set of numeric variables be represented?

  • As a point in a multidimensional space (correct)
  • As a timeline
  • As a polygon
  • As a pie chart
  • What is the matrix called that represents the collection of data objects with a fixed set of numeric variables?

  • Pattern Matrix (correct)
  • Data Frame
  • Data Array
  • Numeric Table
  • What kind of transformation can be applied to a data matrix due to its numeric variables?

    <p>Standard matrix operations</p> Signup and view all the answers

    Which term describes a set of data objects interpreted as an m by n matrix?

    <p>Data Matrix</p> Signup and view all the answers

    What do binary attributes in transaction data typically indicate?

    <p>Whether an item was purchased or not</p> Signup and view all the answers

    What is another term for asymmetric attributes in a data set?

    <p>Features</p> Signup and view all the answers

    In the context of a data matrix, what do the rows represent?

    <p>Objects</p> Signup and view all the answers

    What type of data is associated with market basket analysis?

    <p>Binary Attributes</p> Signup and view all the answers

    How are transaction data sets typically represented?

    <p>Records</p> Signup and view all the answers

    What distinguishes binary attributes from other types of attributes?

    <p>They have only two distinct values.</p> Signup and view all the answers

    Which term is often used interchangeably with 'features' in the context of data analysis?

    <p>Characteristics</p> Signup and view all the answers

    Which of the following best describes a binary variable?

    <p>A variable that can only take on two categories or states</p> Signup and view all the answers

    In the context of asymmetric binary variables, what is an example of an equally valuable symmetric binary variable?

    <p>'Gender' as a binary variable with male and female states</p> Signup and view all the answers

    Consider the binary attribute 'smoker'. What does the value 1 typically indicate?

    <p>The patient smokes</p> Signup and view all the answers

    How is a symmetric binary variable defined?

    <p>There is no preference on which outcome is coded as 0 or 1</p> Signup and view all the answers

    Which term is used for binary variables when the two states correspond to true and false?

    <p>Boolean variables</p> Signup and view all the answers

    When a binary variable is asymmetric, what does it imply about the importance of its outcomes?

    <p>'1' state is more important than '0' state</p> Signup and view all the answers

    Study Notes

    Data Objects and Attributes

    • A data object is an observation, record, point, case, sample, entity, or instance, with multiple attributes that describe it.
    • An attribute is a property or characteristic of an object, also known as a variable, field, characteristic, dimension, or feature.

    Types of Attributes/Variables

    • Discrete attributes can only take on specific values, while continuous attributes can take on any value within a range.
    • Examples of discrete attributes: binary variables, number of items purchased.
    • Examples of continuous attributes: temperature, height, weight.

    Data Matrix

    • A data matrix is a table where each row represents an object, and each column represents a variable or attribute.
    • The data matrix is a variation of record data, and standard matrix operations can be applied to transform and manipulate the data.

    Binary Variables

    • Binary variables are nominal variables with only two categories or states: 0 or 1.
    • Examples of binary variables: smoker (yes/no), medical test result (positive/negative), gender (male/female).
    • Binary variables can be symmetric (equally valuable outcomes) or asymmetric (outcomes with different importance).

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    Description

    Test your knowledge on continuous variables which can take on an infinite number of possibilities, and binary variables which have only two categories. Learn about properties of binary variables, such as the Boolean representation of true and false.

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