Levels of measurement

Question 1

What are the levels of measurement?

Answer 1

Nominal
Ordinal
Interval

Question 2

What is nominal data?

Answer 2

Data is in categories
Its discrete – 1 item can only appear in 1 category

Question 3

Give an example of nominal data

Answer 3

E.g. number of boys and girls who did and did not conform in line test

Question 4

What is ordinal data?

Answer 4

Ordered in some way
Does not have equal intervals between each unit
Lacks precision as subjective

Question 5

Give an example of ordinal data

Answer 5

E.g. a rating of Psychology from 1-10
E.g. IQ test scores, personality scores

Question 6

What is interval data?

Answer 6

Based on numerical scales
Include units of equal precisely defined size

Question 7

Give an example of interval data

Answer 7

E.g. science measures such as time, temperature, heart rate etc.

Question 8

Choosing Measures of Central Tendency and Dispersion table

Answer 8

Question 9

What 3 factors do you look at to choose a statistical test?

Answer 9

1) Check if difference or correlation (or association)
2) Type of experimental design
3) Level of measurement

Question 10

Choosing an inferential Statistical Test

Answer 10