Levels of measurement

Question 1

How to remember levels of measurement?

Answer 1

NOIR:
Nominal
Ordinal
Interval
Ratio

Question 2

Nominal

Answer 2

Shows categories of data represented by frequencies. No relative numerical value.
E.g. groups like Girls and Boys

Question 3

Ordinal

Answer 3

Data can be placed into ascending or descending order but intervals between data not necessarily equal.
E.g. times for 1st, 2nd and 3rd in a race. Happiness scale 1-5

Question 4

Ratio

Answer 4

Equal intervals between scores and has absolute/true zero point.
E.g. speed (mph)

Question 4

Interval

Answer 4

Equal numerical intervals between scores. E.g. temperature. Interval between 1-2 degrees is same as 21-22 degrees

Question 5

What are levels of measurement

Answer 5

Refer to the way variables/data have been measured within a study. Signify both the type of data that has been collected and how sophisticated/complex the data ia

Question 6

What are levels of measurement used for

Answer 6

So we can correctly identify an appropriate statistical test and draw conclusions about differences across the data set accordingly

Question 7

What is the difference between each level of measurement?

Answer 7

-how sophisticated or detailed each is. Nominal least bcs gives basic picture (e.g. 7 people own dog, 8 don’t).
Ratio most sophisticated because it’s both interval and has true 0 point.