Levels of measurement

Question 1

What is nominal data?

Answer 1

Shows categories of data by frequencies
no relative numerical value
e.g. boys and girls

Question 2

What is ordinal data?

Answer 2

-where data can be placed into ascending/descending order
-intervals between data are not always equal
e.g. 1st, 2nd, 3rd in a race: ascending order but intervals between times may not be equal

Question 3

what is interval data?

Answer 3

• equal numerical intervals between scored
  e.g. temperature
  interval between 1&2 degrees is the same as between 21&22 degrees

Question 4

What is ratio data?

Answer 4

• equal intervals between scores and has absolute/ true zero point
  e.g speed (mph)
• most sophisticated

Question 5

What is meant by sophistication?

Answer 5

how much detail each measure gives about the detail it provides

Question 6

Why does the sophistication level of the data matter?

Answer 6

• the level of sophistication impacts the type of statistical test that will be used