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 (A)</p> Signup and view all the answers

What is an example each for continuous ratio scale data

<p>Weight (B)</p> Signup and view all the answers

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

<p>heart rate (C)</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 (A)</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 (D)</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 (B)</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 (D)</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 (C)</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. (D)</p> Signup and view all the answers

Biochemist measures concentration of peptide in mol/L:

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

Public health official records causes of death:

<p>Nominal (B)</p> Signup and view all the answers

Microbiologist counts number of colonies of bacteria

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

A nurse notes the type of rash

<p>Nominal (D)</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. (D)</p> Signup and view all the answers

What is a characteristic of categorical - nominal data?

<p>Categories can be assigned numerical values for analysis. (D)</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. (C)</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. (A)</p> Signup and view all the answers

What is an example of ordinal data?

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

Define ordinal data

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

Ordinal data is not linear

<p>True (A)</p> Signup and view all the answers

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