Chapter 2

Question 1

Nominal scale

Answer 1

describes a variable with categories that do not have a natural order or ranking. (e.g. genotype, gender etc)

Question 2

Ordinal scale

Answer 2

variable order matters but not the differences between values. (e.g. socioeconomic status, educational level)

Question 3

Interval scales

Answer 3

variable where there is order and the differences between 2 values is meaningful. (e.g. temp, pH, scores)

Question 4

Ratio scaless

Answer 4

variables here have all properties of interval scales and also has a clear definition of 0. Can be none of the variable. (e.g. reaction rate, weight, length, temp in kelvin)