Jan19_Prob&Stat

survey

interview

observations

historical analysis

using checklists

Qualitative variables represent differences in quality, character, or kind but not in amount.

Quantitative variables are numerical in nature and can be ordered or ranked. 

QUANTITATIVE: Discrete variable is a variable whose values can be counted using integral values 

QUANTITATIVE: Continuous variable is a variable that can assume any numerical value over an interval or intervals.

Use numbers for the purpose of identifying name or membership in a group or category.

All qualitative variables are measured on a nominal scale.

It consists of “naming” observations or classifying them into various mutually exclusive and collectively exhaustive categories.

Connote ranking or inequalities

Numbers represent “greater than” or “less than” measurements, such as preference or ranking

Indicates an actual amount and there is equal unit of measurement separating each score, specifically equal intervals.

Do not only include “greater than” and “less than” relationships, but also has a limit of measurement that permits us to describe how much more or less one object possesses than another.

Are similar to interval data, but has an absolute zero and multiples are meaningful.

highest level of measurements