levo

Mathematical Requirements for Research Methods

Distinguishing levels of measurement

  • 3 things to know
  • Component 01

Overview

Recall questions on the three levels of measurement, why nominal data cannot be ranked or averaged, what ordinal data adds, why rating scales are ordinal, and why means suit interval data.

What you need to know

Answer each one before you reveal it.

Your recallNot started
Key term

State the one thing ordinal data tells you that nominal data does not.

Key term

Why can a mean be calculated from interval data but not properly from ordinal data?

Key term

Name the three levels of measurement.

Questions from this subtopic

Each one with the model answer underneath.

  1. 1

    Name the three levels of measurement.

    Model answer

    Nominal, ordinal and interval.

  2. 2

    Why can nominal data not be ranked or averaged?

    Model answer

    The categories differ only in kind and carry no order or numerical size, so the only summary available is a count of how many fall into each one.

  3. 3

    Give an example of nominal data from an observation.

    Model answer

    The number of children recorded in each behavioural category, such as how many shared, how many played alone and how many argued.

  4. 4

    State the one thing ordinal data tells you that nominal data does not.

    Model answer

    Ordinal data tells you the order of the cases, so one can be said to be higher or lower than another, whereas nominal data records only which category each case falls into.

  5. 5

    Why is a score from a rating scale treated as ordinal rather than interval?

    Model answer

    The scale is subjective, so the psychological distance between 4 and 5 is not necessarily the same as between 1 and 2.

  6. 6

    Why can a mean be calculated from interval data but not properly from ordinal data?

    Model answer

    Interval data is measured in equal units of a publicly agreed size, so the scores can meaningfully be added and divided, whereas the gaps between ordinal ranks are unequal and unknown so their total has no meaning.

Other ways to work this

The same content, four other ways.

What is inside Levo

Six ways to work the same material.

1Closed book
2Open book
3Closed book

The 3-step method, run for you

Answer cold, learn it, then prove it stuck. Levo tracks the jump between your first attempt and your last.

Research Methods and Techniques
Planning and Conducting Research
Data Recording, Analysis and Presentation
Report Writing and Scientific Communication

Cram a whole paper in one sitting

Sort every topic into what you know and what you do not, then drill only the weak ones.

The tests are a old.
centurydecadeyear

Blank Blitz makes facts automatic

Rapid timed gap-fills on the terms and numbers you need to recall without thinking.

APunishment requires deprivation, loss of autonomy and stigma.
BReform requires trust, responsibility and self-respect.
CThe regime that achieves one tends to undermine the other.

Build It gets the exam shape right

Assemble a full-mark answer from its marking points, in the order an examiner wants them.

Range means the highest score minus the lowest score.
TrueFalse

Test It catches misconceptions

Spot the fault in a statement. The traps are the mistakes students actually make.

721941163128510

Brain Breaks between sessions

Short focus games to reset attention, so the next set lands better than the last.

Every question in Mathematical Requirements for Research Methods, on a schedule.

Attempt a question from memory, write the correct version, then attempt it again. Levo records the jump between your first attempt and your last, and brings each question back on the day you are due to forget it.

Or £46 a year, about £3.83 a month. Cancel anytime.