A researcher studying the effects of an intervention on symptoms measures the time from intervention to absence of symptoms and reports this in the number of days.This measure represents which level of measurement?
A) Interval
B) Nominal
C) Ordinal
D) Ratio

Question

Quizplus · Accepted Answer

Interval level measurement uses interval scales,which have equal numerical distances between intervals.Nominal level measurement is used when data can be organized into categories of a defined property,such as a disease diagnosis,but when categories cannot be rank ordered.Ordinal level measurement is used when data collected can be rank ordered.Ratio level measurement uses all aspects of other types of measurement: mutually exclusive categories,exhaustive categories,ordered ranks,equally spaced intervals,and a continuum of values.

A Researcher Studying the Effects of an Intervention on Symptoms