Levels of measurements
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Questions and Answers

Which of the following is a characteristic of ratio scale data?

  • It has a relative zero point and inconsistent intervals
  • It has a relative zero point and consistent intervals
  • It has a true zero point and inconsistent intervals
  • It has a real zero point and consistent intervals (correct)
  • What type of data are counts of specific events or items according to the text?

  • Discontinuous data (correct)
  • Inconsistent data
  • Continuous data
  • Relative data
  • What mathematical operations can be performed on ratio scale data due to its true zero point and consistent intervals?

  • Addition and subtraction only
  • Addition, multiplication, and division only
  • Addition, subtraction, and division only
  • Addition, subtraction, multiplication, and division (correct)
  • Which type of ratio scale data can take any value within a range?

    <p>Continuous data</p> Signup and view all the answers

    What is an example each for continuous ratio scale data

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

    Whats an example each for discontinuous (discrete) ratio scale data

    <p>heart rate</p> Signup and view all the answers

    Why is it possible to perform all sorts of mathematical operations on ratio scale data?

    <p>because there is a true point zero and consistent intervals</p> Signup and view all the answers

    What does a ‘true zero point’ mean in the context of ratio scale data?

    <p>A point in the scale that indicates the absence of what's being measured</p> Signup and view all the answers

    What type of mathematical operations can be performed on interval scale data?

    <p>Addition and subtraction</p> Signup and view all the answers

    Why can't we say that 40°C is 'twice as hot' as 20°C on the Celsius scale?

    <p>The Celsius scale does not have a true zero point</p> Signup and view all the answers

    Which temperature scale has a true zero point and consistent intervals, allowing for multiplication and division?

    <p>Kelvin scale</p> Signup and view all the answers

    What distinguishes interval scale data from ratio scale data?

    <p>Presence of a true zero point meaning you cannot perform multiplication and division</p> Signup and view all the answers

    If absolute zero (the coldest possible temperature) is -273.15°C on the Celsius scale, what does it mean when we say that this type of data lacks a true zero point?

    <p>an interval scale, zero is not the absolute lowest point. It’s an arbitrary point, and values can go below zero.</p> Signup and view all the answers

    Biochemist measures concentration of peptide in mol/L:

    <p>Ratio continuous</p> Signup and view all the answers

    Public health official records causes of death:

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

    Microbiologist counts number of colonies of bacteria

    <p>Ratio discrete</p> Signup and view all the answers

    A nurse notes the type of rash

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

    What best describes the nature of categorical - nominal data?

    <p>It involves named or labeled categories without mathematical meaning.</p> Signup and view all the answers

    What is a characteristic of categorical - nominal data?

    <p>Categories can be assigned numerical values for analysis.</p> Signup and view all the answers

    Why is it important to remember that categorical - nominal data lacks a true mathematical relationship?

    <p>To prevent incorrect assumptions about the relationships between categories.</p> Signup and view all the answers

    What distinguishes categorical - nominal data from ratio scale data?

    <p>Categorical data allows for multiplication and division operations.</p> Signup and view all the answers

    What is an example of ordinal data?

    <p>Customer satisfaction ratings</p> Signup and view all the answers

    Define ordinal data

    <p>Data that is placed into categories that can be ranked</p> Signup and view all the answers

    Ordinal data is not linear

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

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