Data Science Fundamentals Quiz
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Data Science Fundamentals Quiz

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Questions and Answers

What does NOIR stand for in data categorization?

  • Nominal, Ordinal, Interval, Ratio (correct)
  • Normal, Ordered, Interlinked, Ratio
  • Numerical, Ordinal, Interval, Range
  • None of the above
  • What type of data is considered quantitative?

    Numerical data

    What is a nominal variable?

    A variable that takes a value among a set of mutually exclusive codes with no logical order.

    A nominal data variable can have mathematical interpretations.

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

    What is an example of a binary variable?

    <p>Switch: {ON, OFF}</p> Signup and view all the answers

    Which of the following is an example of nominal data?

    <p>Blood group</p> Signup and view all the answers

    The categorization of data types into NOIR allows for understanding the __________ of data.

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

    Study Notes

    Datasets

    • Record data
      • Relational records: Database, relational tables, highly structured
      • Data matrix: Numerical matrix, crosstabs
      • Transaction data: Individual events
      • Document data: Term-frequency vector (matrix) of text documents
    • Graphs and networks

    Data in Data Science

    • Entity: A particular thing
    • Attribute: A measurable property of an entity
    • Data: A measurement of an attribute

    Data Categorization - NOIR Topology

    • N: Nominal
    • O: Ordinal
    • I: Interval
    • R: Ratio

    Nominal Scale

    • Definition: Variables with mutually exclusive categories without a logical order.
    • Examples:
      • Gender: {M, F} or {1, 0}
      • Blood groups: {A, B, AB, O}
      • Rhesus (Rh) factors: {+, -}
      • Country code: 048, 040
    • Note: Data categorization using naming convention (numbers, letters, or strings). No mathematical interpretation of numerical values.

    Binary Scale

    • Definition: Nominal variable with two mutually exclusive categories without a logical order.
    • Examples:
      • Switch: {ON, OFF}
      • True/False: {True, False}
      • Yes/No: {Yes, No}
    • Types:
      • Symmetric: Both categories have equal importance.
      • Asymmetric: One category is more important than the other.

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    Description

    This quiz explores the fundamental concepts of data science, including data types, categorization, and the NOIR topology. Test your understanding of relational records, nominal scales, and more through a series of questions that cover critical data science topics.

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